The present invention provides an automatic detection apparatus, and belongs to the technical field of machinery, wherein the problem that the material feeding and the material discharge of the existing work-piece detection equipment adopt the artificial manner so as to provide low efficiency is solved. The automatic detection apparatus comprises a rack and a rotation disk, wherein the rack is provided with a material inlet device, a first detection device, a second detection device, a qualified product receiving device and a defective product receiving device, a plurality of benchmark plates are uniformly distributed on the rotation disk, the material inlet device comprises a guide column, a rotation table and a rotating motor, the guide column is vertically provided with a material taking telescopic gas cylinder, the material taking telescopic gas cylinder is provided with a material inlet suction nozzle, a product placement fixture is placed on the rotation table, the qualified product receiving device comprises a material storage mechanism and a material receiving mechanism arranged on the rack, the defective product receiving device comprises a recovery assembly and a grabbing assembly, and the detected defective product work-piece can be transferred into the recovery assembly with the grabbing assembly. The automatic detection apparatus has advantages of high work efficiency, high detection precision and high automation degree.