Polyester film winding and roll changing mechanism facilitating discharging

The polyester film winding and roll changing mechanism comprises a supporting frame, a winding mechanism and a fixing mechanism, sliding grooves are formed in the two sides of the supporting frame, sliding frames are movably connected into the sliding grooves, two rotating blocks are movably connected to one side of one sliding frame, and the other side of the other sliding frame is movably connected with the winding mechanism. And one side of each rotating block is movably connected with a polyester film winding roller, one end of each polyester film winding roller is fixedly connected with a second clamping block, two sliding holes are formed in one side of the other sliding frame, connecting rods are arranged in the two sliding holes, and clamping grooves are formed in one ends of the connecting rods. According to the utility model, the polyester film can be wound without stop, the time is saved, the efficiency is improved, the angle of the sliding frame can be prevented from being changed due to the weigh