Underframe of air compressor

The utility model provides a bottom frame of an air compressor. The bottom frame comprises a fixing plate; the fixing frames are fixedly installed on the front face and the back face of the bottom of the fixing plate correspondingly, sliding cavities are formed in the fixing frames, buffer springs are fixedly installed at the tops of the inner side faces of the sliding cavities, sliding plates are fixedly installed at the bottoms of the buffer springs, and the sliding plates are slidably connected to the inner side faces of the sliding cavities; and a bottom plate is fixedly installed at the bottom of the sliding plate, a damping rod is fixedly installed at the top of the bottom plate, a connecting plate is fixedly installed at the top of the damping rod, and the two ends of the connecting plate are fixedly installed on one sides of the two fixing frames correspondingly. According to the bottom frame of the air compressor, the fixing frame, the sliding cavities, the buffer springs, the sliding plate, the bott