Document and Entity Information
12 Months Ended
Mar. 31, 2019
Document and Entity Information  
Entity Registrant Name Ruhnn Holding Ltd
Entity Central Index Key 0001753268
Entity Current Reporting Status Yes
Entity Filer Category Non-accelerated Filer
Current Fiscal Year End Date --03-31
Entity Well Known Seasoned Issuer No
Entity Voluntary Filers No
Entity Common Stock, Shares Outstanding 363,572,659
Document Type 20-F
Document Period End Date Mar. 31, 2019
Amendment Flag false
Document Fiscal Year Focus 2019
Document Fiscal Period Focus FY
Entity Shell Company false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false