Hand-held film winding device capable of automatically adjusting tension

According to the device, a handheld rod is slidably connected with a tension roller, the rotating axis of the tension roller is parallel to the rotating axis of a rotating disc, an elastic part A used for keeping the tension roller away from the rotating disc is arranged between the tension roller and the handheld rod, and an elastic part B used for keeping the rotating disc to extrude a core is arranged between the rotating disc and the handheld rod. The tension roller is connected with an adjusting piece located between the elastic part B and the handheld rod, and the surface, facing the elastic part B, of the adjusting piece inclines from the elastic part B towards the tension roller and away from the elastic part B. When the device is used, a packaging film passes through the tension roller, and when the tension of the film is large, the tension roller drives the adjusting piece to move towards the direction of the rotating disc, the elastic force of the elastic part A to the rotating disc is reduced, the