FORM 10-Q
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


(Mark One)

[x]  Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange
     Act of 1934 For the quarterly period ended

                                 MARCH 31, 2001

[ ]  Transition  report  pursuant  to Section  13 or 15(d) of the  Securities
     Exchange Act of 1934

             For the transition period from __________ to __________


                         Commission File Number: 0-13807

                             CABLE TV FUND 12-B, LTD
                Exact name of registrant as specified in charter

          Colorado                                      #84-0969999
- --------------------------------------------------------------------------------
   State of organization                          I.R.S. employer I.D. #

                             c/o Comcast Corporation
                 1500 Market Street, Philadelphia, PA 19102-2148
- --------------------------------------------------------------------------------
                      Address of principal executive office

                                 (215) 665-1700
- --------------------------------------------------------------------------------
                          Registrant's telephone number

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                      Yes  X                         No
                         ------                        -------





                                                    CABLE TV FUND 12-B, LTD.
                                                    (A Limited Partnership)

                                                    CONDENSED BALANCE SHEET
                                                          (Unaudited)



                                                                                          March 31,            December 31,
                                        ASSETS                                              2001                   2000
                                        ------                                         ----------------       ----------------
                                                                                                               
Cash                                                                                          $118,336               $140,393
                                                                                       ----------------       ----------------

                                                                                              $118,336               $140,393
                                                                                       ================       ================


                           LIABILITIES AND PARTNERS' CAPITAL
                           ---------------------------------

LIABILITIES:
   Advances from affiliates.....................................................                $2,380                $15,690
                                                                                       ----------------       ----------------

         Total liabilities......................................................                 2,380                 15,690
                                                                                       ----------------       ----------------

PARTNERS' CAPITAL:
   General Partner-
     Contributed capital........................................................                 1,000                  1,000
     Distributions..............................................................           (19,696,268)           (19,696,268)
     Accumulated earnings.......................................................            19,724,257             19,726,444
                                                                                       ----------------       ----------------

                                                                                                28,989                 31,176
                                                                                       ----------------       ----------------

Limited Partners-
   Net contributed capital (111,035 units outstanding
     at March 31, 2001 and December 31, 2000)...................................            47,645,060             47,645,060
   Distributions................................................................          (114,620,017)          (114,620,017)
   Accumulated earnings.........................................................            67,061,924             67,068,484
                                                                                       ----------------       ----------------

                                                                                                86,967                 93,527
                                                                                       ----------------       ----------------

                                                                                              $118,336               $140,393
                                                                                       ================       ================


                                          See notes to condensed financial statements.


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                                                CABLE TV FUND 12-B, LTD.
                                                (A Limited Partnership)

                                           CONDENSED STATEMENT OF OPERATIONS
                                                      (Unaudited)



                                                                                         For the Three Months Ended
                                                                                                  March 31,
                                                                                           2001              2000
                                                                                        ------------      ------------
                                                                                                        
OTHER (EXPENSE) INCOME:
   Interest income..............................................................                $62
   Equity in net loss of cable television joint venture.........................                              ($6,162)
   Other, net...................................................................             (8,809)          (11,973)
                                                                                        ------------      ------------

NET LOSS........................................................................            ($8,747)         ($18,135)
                                                                                        ============      ============

ALLOCATION OF NET LOSS:
   General Partner..............................................................           ($2,187)           ($4,534)
                                                                                        ============      ============

   Limited Partners.............................................................           ($6,560)          ($13,601)
                                                                                        ============      ============

NET LOSS PER LIMITED
   PARTNERSHIP UNIT.............................................................            ($0.06)            ($0.12)
                                                                                        ============      ============

WEIGHTED AVERAGE NUMBER OF LIMITED PARTNERSHIP
   UNITS OUTSTANDING............................................................            111,035           111,035
                                                                                        ============      ============


                                      See notes to condensed financial statements.



                                                           2



                                                CABLE TV FUND 12-B, LTD.
                                                (A Limited Partnership)

                                           CONDENSED STATEMENT OF CASH FLOWS
                                                      (Unaudited)



                                                                                       For the Three Months Ended
                                                                                               March 31,
                                                                                       2001                  2000
                                                                                   -------------         -------------

CASH FLOWS FROM OPERATING ACTIVITIES:
                                                                                                       
   Net loss.....................................................................        ($8,747)             ($18,135)
   Adjustments to reconcile net loss to net cash
     used in operating activities:
       Equity in net loss of cable television joint venture.....................                                6,162
       (Decrease) increase in advances from affiliates..........................        (13,310)               11,973
                                                                                   -------------         -------------

         Net cash used in operating activities..................................        (22,057)
                                                                                   -------------         -------------

Decrease in cash................................................................        (22,057)

Cash, beginning of period.......................................................        140,393
                                                                                   -------------         -------------

Cash, end of period.............................................................       $118,336
                                                                                   =============         =============

SUPPLEMENTAL CASH FLOW DISCLOSURE:
   Interest paid................................................................            $59          $
                                                                                   =============         =============


                                      See notes to condensed financial statements.




                                                           3



                            CABLE TV FUND 12-B, LTD.
                             (A Limited Partnership)

                     NOTES TO CONDENSED FINANCIAL STATEMENTS
                                   (Unaudited)

(1) The condensed  balance sheet as of December 31, 2000 has been condensed from
the audited  balance sheet as of that date.  The  condensed  balance sheet as of
March 31, 2001 and the condensed  statements of operations and of cash flows for
the three  months  ended March 31, 2001 and 2000 have been  prepared by Cable TV
Fund  12-B,  Ltd.  (the   "Partnership")  and  have  not  been  audited  by  the
Partnership's   independent  auditors.   In  the  opinion  of  management,   all
adjustments  necessary  to present  fairly the  financial  position,  results of
operations  and cash flows as of March 31,  2001 and for all  periods  presented
have been made.

         Certain  information  and note  disclosures  normally  included  in the
Partnership's  annual financial statements prepared in accordance with generally
accepted accounting  principles have been condensed or omitted.  These condensed
financial statements should be read in conjunction with the financial statements
and notes thereto included in the Partnership's  December 31, 2000 Annual Report
on Form 10-K filed with the Securities and Exchange  Commission.  The results of
operations for the period ended March 31, 2001 are not necessarily indicative of
operating results for the full year.

         The Partnership owns no properties  directly.  The Partnership owns a 9
percent  interest in Cable TV Fund 12-BCD Venture (the  "Venture").  The Venture
has sold all of its cable  television  systems.  The Venture was  liquidated  in
October 2000 and therefore,  the Partnership has no investment in the Venture at
March 31,  2001 or December  31,  2000.  The  Partnership  and the Venture  have
continued in existence  because of pending  litigation in which the  Partnership
and the Venture are a party. It cannot be predicted when the Partnership and the
Venture will be dissolved.

(2) The Partnership  reimburses its general  partner for certain  administrative
expenses.  These expenses  represent the salaries and related  benefits paid for
corporate personnel.  Such personnel provide  administrative,  accounting,  tax,
legal and investor  relations  services to the Partnership.  Such services,  and
their related  costs,  are necessary to the  administration  of the  Partnership
until the Partnership is dissolved.  Such charges were included in other, net in
the accompanying  condensed statement of operations.  Reimbursements made to the
general partner by the Partnership for administrative  expenses during the three
months  ended March 31,  2001 were  $4,457.  Reimbursements  made to the general
partner by the Venture for  administrative  expenses  for the three months ended
March  31,  2000  were  $52,920,   of  which  $4,858  was  attributable  to  the
Partnership.

(3) Summarized financial information regarding the Venture, for the three months
ended March 31, 2000, is presented below.


                       UNAUDITED STATEMENTS OF OPERATIONS

                                                             For the Three
                                                             Months Ended
                                                               March 31,
                                                                 2000
                                                           ------------------

   Other, net.......................................                ($67,126)
                                                           ------------------

         Consolidated loss..........................                ($67,126)
                                                           ==================


                                        4



                            CABLE TV FUND 12-B, LTD.
                             (A Limited Partnership)

         MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
                              RESULTS OF OPERATIONS


FINANCIAL CONDITION

         The  Venture  was  liquidated  in  October  2000  and  therefore,   the
Partnership  has no investment in the Venture at March 31, 2001.  The only asset
of the Partnership at March 31, 2001 was its cash on hand which is being held in
reserve to pay the Partnership's  administrative  expenses until the Partnership
is  dissolved.  The  Partnership  and the Venture  have  continued  in existence
because of pending  litigation  in which the  Partnership  and the Venture are a
party.  It cannot be  predicted  when the  Partnership  and the Venture  will be
dissolved.

RESULTS OF OPERATIONS

         The  Venture  has  sold all of its  cable  television  systems  and was
liquidated  in  October  2000.  Other  expense of $8,809  incurred  in the first
quarter of 2001 by the Partnership  related to various costs associated with the
administration of the Partnership.



                           Part II - OTHER INFORMATION

Item 6.  Exhibits and Reports on Form 8-K.

         a)   Exhibits

              None.

         b)   Reports on Form 8-K

              None.





                                       5



                                   SIGNATURES


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                   CABLE TV FUND 12-B, LTD.

                                   BY:   COMCAST CABLE COMMUNICATIONS, INC.
                                         ------------------------------------
                                         General Partner


                                   By:   /S/ Lawrence J. Salva
                                         ------------------------------------
                                         Lawrence J. Salva
                                         Senior Vice President
                                         (Principal Accounting Officer)


Dated:  May 15, 2001














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