Sealing machine with safety protection device

The utility model discloses a sealing machine with a safety protection device. The sealing machine comprises a machine body, a feeding port is formed in the machine body, a transverse guide rail is fixedly arranged in the feeding port, a film supporting mechanism is arranged on the transverse guide rail in a sliding mode, and a film pressing heat sealing mechanism is arranged in the feeding port. The lower film mechanism comprises a bracket, and a first air cylinder is fixedly arranged in the feeding port. Bottom plates are arranged at the positions, on the two sides of the feeding port, of the machine body, protective frames are elastically arranged on the bottom plates, microswitches are fixedly arranged on the bottom plates, dowel bars are hinged between the microswitches and the protective frames, and the microswitches are electrically connected with controllers of the first air cylinders. When the dowel bar displaces and acts on the action reed of the microswitch, the first air cylinder is triggered to s