Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jan. 31, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-40326
Entity Registrant Name	TuSimple Holdings Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-2341575
Entity Address, Address Line One	9191 Towne Centre Drive
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92122
City Area Code	619
Local Phone Number	916-3144
Title of 12(b) Security	Class A Common Stock, par value $0.0001 per share
Trading Symbol	TSP
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	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	false
Entity Public Float			$ 9,270
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement relating to the 2022 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such definitive proxy statement will be filed with the Securities and Exchange Commission within 120 days after the registrant’s fiscal year ended December 31, 2021.
Entity Central Index Key	0001823593
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		198,148,655
Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		24,000,000