Trousers waist edge folding device and method

The invention provides a trouser waist edge folding device and method. The device comprises a frame body, a clamping mechanism, a supporting mechanism and a folding mechanism, wherein the clamping mechanism, the supporting mechanism and the folding mechanism are arranged on the frame body; the material supporting mechanism comprises a material penetrating plate used for penetrating into a trouser waist; the material penetrating driving assembly is connected with the material penetrating driving assembly so as to drive the material penetrating plate to move linearly; the material supporting assembly is arranged on the material penetrating plate, the material supporting assembly is provided with two material supporting parts, and the two material supporting parts are located on the upper side and the lower side of the material penetrating plate; the material supporting part is used for supporting an inner cavity of the trouser waist after entering the trouser waist; the material supporting driving assembly is c