Smoke exhaust port with filtering function

The utility model discloses a smoke vent with a filtering function in the technical field of smoke vents, which comprises a smoke vent mechanism, the back of the smoke vent mechanism is fixedly communicated with a smoke vent box, a servo motor is fixedly mounted on the peripheral side of the smoke vent box, a support is fixedly mounted in the smoke vent box, and an inner flushing shaft tube is rotatably connected to the axis of the support. The front end of the inner punching shaft pipe fixedly communicates with a wind uniformizing cover, the circumferential side face of the inner punching shaft pipe is rotationally connected with an outer rotating sleeve, the output shaft end of the servo motor is in transmission connection with the inner punching shaft pipe and the outer rotating sleeve, a transmission outer cylinder is fixedly installed on the circumferential side face of the outer rotating sleeve through a connecting frame a, and the circumferential side face of the transmission outer cylinder is rotation