Air compressor with exhaust drying function

The utility model relates to an air compressor with exhaust drying function, which comprises an air compression unit and an exhaust drying unit, the air compression unit comprises a compression cylinder, a piston is arranged in the compression cylinder, an air inlet hole is arranged on the piston, a one-way air inlet valve is arranged in the air inlet hole, and an exhaust hole is arranged on the cylinder wall of the compression cylinder. A one-way exhaust valve is arranged in the exhaust hole, and the piston is connected with a motor. The exhaust drying unit comprises an exhaust box and a drying air storage tank, the exhaust box comprises a box body and an exhaust seat, a box opening of the box body is hermetically communicated with an exhaust hole, the box bottom is provided with an air outlet, a blowback opening and an air return opening, the outer wall of the exhaust seat is provided with an air pressure monitoring cavity, an airflow control cavity and an air return cavity, and an air outlet hole, an air p