The invention provides a tobacco material winnowing method and an equipment thereof. The tobacco material enters through a transportation equipment into a primary winnowing room to choose sundry goods of larger density by the primary winnowing room having higher wind speed; the tobacco material which is wind separated by the primary winnowing enters into a secondary winnowing room having lower wind speed to choose sundry goods with less larger density; the tobacco material which is wind separated by the two winnowing processes is output via a discharge opening. The equipment implementing the method comprises two winnowing rooms connecting with each other in parallel, supplementation wind gap of each winnowing room is provided with a damper to obtain proper air quantity and air speed for winnowing. The equipment is capable of achieving winnowing the tobacco material for two times with enhanced winnowing efficiency, simple structure and convenient maintenance.