The invention mainly discloses a food detection device. According to the technical scheme, the food detection device comprises a mounting platform and supporting frames, wherein the supporting frames are arranged on the mounting platform; a connecting plate is arranged between the supporting frames; a sliding base is in sliding connection with the connecting plate; a positioning plate is connected with the sliding base; a fixing mechanism is arranged on the positioning plate; an ultraviolet lamp is arranged on the fixing mechanism; connecting rod mechanisms are moveably connected with the supporting frames; a working platform is arranged between the connecting rod mechanisms; the working platform slides on the mounting platform; a commodity storage frame is arranged on the working platform; and a catalyst plate is arranged in the commodity storage frame. The food detection device has the advantages of simple structure, connection flexibility, convenience in detaching and maintaining, high detection efficiency, good detection effect and economical and practical properties.