Runway type protective net forming device for filter element of air filter

The invention provides a runway type protective net forming device for a filter element of an air filter. Comprising a tensioning assembly, a driving air cylinder and two clamping assemblies. The tensioning assembly comprises a fixed tensioning block and a movable tensioning block, the fixed tensioning block is fixed relative to the movable tensioning block, and the outer contour of the fixed tensioning block and the inner contour of the air filter element runway type protective net are matched with the inner contour of the air filter element runway type protective net. The end of a piston rod of the driving air cylinder is fixedly connected with a movable tensioning block of the tensioning assembly. The two clamping assemblies are located on the upper side and the lower side of the tensioning assembly respectively, each clamping assembly comprises a clamping air cylinder and a pressing plate, the end of a piston rod of each clamping air cylinder is fixedly connected with the corresponding pressing plate, and