Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Entity File Number	001-34499
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
Entity Address, City or Town	Shouguang City
Entity Address, State or Province	SD
Entity Address, Country	CN
Entity Address, Postal Zip Code	262700
City Area Code	+86 (536)
Local Phone Number	567-0008
Title of 12(b) Security	Common Stock, $0.0005 par value
Trading Symbol	GURE
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float				$ 44,300,000
Entity Common Stock, Shares Outstanding			10,471,924
Auditor Firm ID	1171	536
Auditor Name	WWC, P.C.	Morison Cogen LLP
Auditor Location	San Mateo, CA	Blue Bell, Pennsylvania