Document and Entity Information - USD ($)	9 Months Ended
	Jan. 31, 2018	Mar. 16, 2018	Oct. 31, 2016
Document and Entity Information:
Entity Registrant Name	SUNWIN STEVIA INTERNATIONAL, INC.
Document Type	10-Q
Document Period End Date	Jan. 31, 2018
Trading Symbol	suwn
Amendment Flag	false
Entity Central Index Key	0000806592
Current Fiscal Year End Date	--04-30
Entity Common Stock, Shares Outstanding		199,632,803
Entity Public Float			$ 13,406,525
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3