The invention discloses a winding device for cutting disused thin films during manufacture of packaging bags. The winding device comprises a baffle board A, a baffle board B and a guide mechanism. The baffle board A and the baffle board B are connected with a rotary shaft of a motor. The guide mechanism is fixed on a base, the bottom of which is provided with multiple universal wheels having brakes. The rotary shaft is provided with a speed counter. The guide mechanism is composed of a support rod and a circular ring at the upper end of the support rod. The plane of the circular ring is smooth such that disused thin films can be rapidly wound around the rotary shaft. When workload is heavy, the baffle board B moves to increase the distance between the baffle board B and the baffle board A. The winding device for cutting disused thin films during manufacture of packaging bags has following beneficial effects: the winding device can be connected with two or three pieces of machining equipment for collecting disused thin films generated; the brakes on the universal wheels can be used for fixing the guide mechanism in operation to keep stability; the speed counter can record the rotation velocity of the rotary shaft and the number of turns in order to provide data support to an operator; and therefore rotation velocity and frequency of the motor are adjusted.