Cover
| Cover | Sep. 14, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 14, 2021 |
| Entity File Number | 000-20936 |
| Entity Registrant Name | Gulf Resources, Inc. |
| Entity Central Index Key | 0000885462 |
| Entity Tax Identification Number | 13-3637458 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | Level 11,Vegetable Building, |
| Entity Address, Address Line Two | Industrial Park of the East City, |
| Entity Address, City or Town | Shouguang City |
| Entity Address, Country | CN |
| Entity Address, Postal Zip Code | 262700 |
| City Area Code | +86 (536) |
| Local Phone Number | 567 0008 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0005 par value |
| Trading Symbol | GURE |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |