The invention relates to an automatic patching machine, which comprises a machine frame, a conveying assembly, a feeding assembly and a mechanical hand, wherein the conveying assembly is arranged on the machine frame, is used for conveying a patched object and sequentially comprises a material supply buffer station, a patching station and a material discharging buffer station in the conveying direction of the conveying assembly, and the material supply buffer station, the patching station and the material discharging buffer station respectively and independently form a conveying unit; the feeding assembly is arranged on the machine frame and is used for feeding patching objects; and the mechanical hand is arranged on the machine frame, the free end of the mechanical hand is provided with a gripping assembly used for gripping the patching object at the tail end of the feeding assembly, and the mechanical hand is used for driving the gripping assembly to move between the material discharging end of the feeding assembly and the patching station of the conveying assembly. Compared with the prior art, the automatic patching machine can simultaneously grip a plurality of patching objects for carrying out gradual patching, the manual operation is replaced, and the patching efficiency is greatly improved; because the mechanical hand is adopted as an active moving element, the maintenance is relatively simpler; the positioning is realized through a CCD (charge coupled device), the patching precision is improved, and the defective rate is reduced; and in addition, the automatic patching machine has the advantages that the structure is simple, the assembly is simple, the occupied space of the whole machine is relatively smaller, and the purchasing cost of equipment of manufacturers is greatly reduced.