The utility model belongs to the technical field of power transmission and transformation construction equipment, especially, relate to an unwrapping wire sheave piece rubber coating device. An adjusting -fixing block for a laser tube, one end of the support rack is hinged at the support, wheel piece and auxiliary assembly, the support frame is rotationally installed on the base, the wheel piece is installed on the support frame, auxiliary assembly includes the backup pad, horizontal sleeve, horizontal screw, vertical sleeve, vertical screw rod and fender rod, the backup pad is installed on the base, the backup pad is located the lateral part of support frame, horizontal sleeve along the level to fixed mounting in the backup pad, the horizontal screw screw thread passes horizontal sleeve,vertical sleeve sets up in the one end of horizontal screw towards the support frame perpendicularly, vertical screw rod screw thread passes vertical sleeve, keep off the bottom of rod fixed mountingat vertical screw rod, keep off the outside that the rod is located the race of round piece. The utility model has the characteristics of the installation is swift convenient, alleviates workman's intensity of labour, improves the installation effectiveness, completion unwrapping wire coaster maintenance task for guaranteeing both quality and quantity provides good material conditions.