Cover Page	12 Months Ended
	Mar. 31, 2021 shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Registration Statement	false
Document Annual Report	true
Document Transition Report	false
Document Shell Company Report	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Registrant Name	Boqii Holding Ltd
Entity Central Index Key	0001815021
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Voluntary Filers	No
Entity Interactive Data Current	Yes
Entity Address, Country	CN
ICFR Auditor Attestation Flag	false
Entity Incorporation, State or Country Code	E9
Document Accounting Standard	U.S. GAAP
Ordinary Shares [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	67,542,837
Class A Ordinary Shares [Member]
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary shares, par value US$0.001 per share
No Trading Symbol Flag	true
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding	54,505,108
Class B Ordinary Shares [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	13,037,729
American Depositary Shares [Member]
Document Information [Line Items]
Title of 12(b) Security	American depositary shares, each ADS represents 0.75 Class A ordinary shares, par value US$0.001 per share
Trading Symbol	BQ
Security Exchange Name	NYSE