Film pressing device for biological materials

The utility model discloses a biomaterial film pressing device which comprises a base, an air cylinder is fixedly installed on the base, a supporting rod is arranged in the base in a sliding and sleeved mode, a pressing plate is fixedly installed at the upper end of the supporting rod, the output end of the air cylinder is fixedly connected with a push plate used for bearing biomaterials, and the supporting rod moves upwards through impact force generated by film pressing operation. The traction rod drives a guide block to horizontally move in a guide groove, a first spring is stretched, the first spring and impact force for driving a supporting rod to move upwards form counter force through the elastic force effect of the first spring, a second piston rod is extruded through a second limiting ring, a third spring is stretched, and under the acting force of air pressure, the first spring and the second piston rod are separated; and a second piston rod extrudes and pushes a first limiting ring, so that counter