| Cover | 3 Months Ended |
| Mar. 31, 2022 | |
| Cover [Abstract] | |
| Entity Registrant Name | T-REX Acquisition Corp. |
| Entity Central Index Key | 0001437750 |
| Document Type | S-1/A |
| Amendment Flag | true |
| Entity Small Business | true |
| Entity Emerging Growth Company | false |
| Entity Filer Category | Non-accelerated Filer |
| Entity Incorporation State Country Code | NV |
| Entity Tax Identification Number | 26-1754034 |
| Entity Address State Or Province | FL |
| Entity Address Address Line 2 | 4th Street |
| Entity Address Address Line 1 | 7301 NW |
| Entity Address Address Line 3 | Suite 102 |
| Entity Address City Or Town | Plantation |
| Entity Address Postal Zip Code | 33317 |
| City Area Code | 954 |
| Local Phone Number | 742-3001 |
| Amendment Description | The Registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment that specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine. |
