The invention provides a polishing and cleaning device for metal rods. The polishing and cleaning device comprises a box body and a water discharge box and is characterized in that the lower portion of the inner side wall of the box body is horizontally and fixedly connected with a bottom plate, the bottom plate is arranged with the inner wall of the box body in a sealed manner, one end of the topof the bottom plate is vertically and fixedly connected with a pair of hydraulic cylinders I, the output ends of the hydraulic cylinders I are vertically and fixedly connected with pushing rods I, the outer sides of the hydraulic cylinders I are provided with waterproof hoods I and the tops of the waterproof hoods I are provided with strip-type holes matched with the pushing rods I, the top end of one of the pushing rods I is horizontally and fixedly connected with a motor I, the output end of the motor I is horizontally and fixedly connected with a rotating shaft, the outer side of the motorI is provided with a waterproof hood II, and the position, corresponding to the rotating shaft, of the waterproof hood II is provided with a through hole matched with the rotating shaft. According tothe polishing and cleaning device for the metal rods, polishing wheels are easy and convenient to replace, the situation that powder generated in polishing is inhaled by workers to harm to the body health is avoided, meanwhile, the polished metal rods can be cleaned in time, time is saved, and the work efficiency is improved.