The utility model discloses a motor belt pulley plugging -out device, including support, jackscrew, top wire receptacle, the center welding of support front end is used for hugging closely the driver chuck of being taken off terminal surface in the article, and support rear end center welding centre bore cover is used for passing cooperation top wire receptacle and jackscrew together, and wherein the front end of jackscrew withstands the outer terminal surface of the center pin of being taken off the article, driver chuck design is used for quick buckle and is being taken off the epaxial U -shaped groove in article center. Center borehole jack inner wall sets up ka tai, top wire receptacle outer wall back end setting ends into shoulder and card at the inner wall card bench of central borehole jack, and top wire receptacle outer wall anterior segment is offered the recess and is inserted spacing picture peg. The jackscrew can be replaced into pneumatic cylinder actuating mechanism with top wire receptacle as actuating mechanism. The utility model relates to a for the overall?framework structure, the design has double dynamical quick change mechanism. Change a contact into, increased area of contact, make to pull out being connected between trochus and the belt pulley to become firm reliable, convenient easy going.