The invention relates to an automatic polishing chamfering machine of a table board. The automatic polishing chamfering machine comprises a rack and a distribution control box. The rack is uniformly provided with polishing chamfering devices, each polishing chamfering device comprises an abrasive belt which is arranged on the rack and is upwards inclined from front to back, and a feeding mechanism matched with the table board and making the table board be fed in a front-rear horizontal manner is arranged in a gap between every two adjacent abrasive belts; and each feeding mechanism comprises a feeding device arranged on the rack and being capable of performing front-rear feeding, each feeding device is provided with a feeding clamper matched with the table board, and the feeding devices and the feeding clampers are connected to the distribution control box. According to the automatic polishing chamfering machine of the table board, the abrasive belts which are arranged in an inclined manner are adopted as the polishing chamfering devices in cooperation with the feeding mechanisms capable of making the table board be fed in a horizontal front-rear manner to achieve fixed-angle chamfering of the table board, chamfering efficiency is improved, the situation that abrasive belts are loose is avoided, and consistency of polishing chamfering is guaranteed.