Air filter capable of being maintained without disassembly

The invention relates to the technical field of air filters, and discloses an air filter capable of being maintained without disassembly. The air filter comprises a shell, an air filter element, an air filter inlet pipe, a blowing pipe and an air filter outlet pipe; the air filter element is arranged in the shell, and the air filter inlet pipe and the air filter outlet pipe which correspond to the air filter element in position are arranged in the shell; the blowing pipe is arranged on the air filter air outlet pipe, a blowing nozzle facing the interior of the air filter element is arranged at one end of the blowing pipe, and the other end of the blowing pipe is connected with a back-blowing module when needed; and the back-blowing module is used for performing back blowing on the air filter element and removing dust on the surface. The air filter is simple in overall structure, reliable in function and easy to realize, and disassembly-free maintenance of the air filter element can be realized, so that the ma