Disclosed is a chopping board grinding machine, comprising a chamfering mechanism (10), a coarse grinding mechanism (20), a finish grinding mechanism (30), a transport mechanism (40) and a rack (50), wherein the chamfering mechanism comprises a fixing unit (101) and a chamfering unit (102), and the fixing unit (101) is provided with a fixed power module (1011) and a movable power module (1012); the coarse grinding mechanism (20) comprises a coarse grinding unit (201) and an edge chamfering unit (202); the finish grinding mechanism (30) comprises a finish grinding unit (301) and a gas spray unit (302); and the transport mechanism (40) is used for transporting a chopping board between mechanisms. The chopping board grinding machine can realize the processes of automatically chamfering, coarse grinding, edge chamfering and finish grinding; during finish grinding processing, gas is sprayed through the gas spray unit, so that the cleanliness of the board surface of the chopping board can be guaranteed to be relati
