Abstract: A polishing machine with an automatic feed and discharge function includes a machine frame, a clamping mechanism, a polishing shaft, a feed mechanism and a discharge mechanism. The clamping mechanism, the discharge mechanism, the polishing shaft and the feed mechanism are mounted on the machine frame. Multiple polishing heads are mounted on the polishing shaft. The feed mechanism includes a feed frame, a sliding platform, a sliding drive member, multiple columns of storage mechanisms for storing polishing pads, and multiple columns of push mechanisms, and the number of the columns of the storage mechanisms matches the number of the columns of the push mechanisms. The feed frame is mounted on the machine frame. The sliding platform is slidably arranged on the feed frame. The storage mechanisms are mounted on the sliding platform. The push mechanisms are mounted on the feed frame and are located above the storage mechanisms.