Winding device for film blowing machine

The utility model relates to the technical field of film blowing machines, in particular to a winding device for a film blowing machine, which comprises a bottom plate, a first vertical plate, a motor, a first square block, a roller, a second square block, a sliding mechanism and a limiting mechanism, the first vertical plate is arranged on one side of the top of the bottom plate, the motor is arranged on the first vertical plate, and the second square block is arranged on the roller. The output end of the motor is connected with the first square block, a first square groove is formed in one side of the roller, the first square block extends into the first square groove, the sliding mechanism comprises a first sliding groove and a first sliding block, the first sliding groove is formed in the bottom plate, one end of the first sliding block is arranged on the first sliding groove, and the other end of the first sliding block is arranged on the first sliding groove. One end of the first sliding block is connec