The invention provides an efficient three-dimensional parking system, belongs to a three-dimensional parking system and particularly relates to a multi-storey up-down and translation mechanical parking system. The efficient three-dimensional parking system is characterized by comprising top-storey lifting appliances, a frame, a middle mechanism, vehicle warding frames, a bottom-storey translation vehicle-carrying plate and an underground rail, wherein the top-storey lifting appliances are evenly arranged above top-layer cross beams of the frame, and are fixed through screws; the middle mechanism is positioned above a middle-layer cross beam of the frame, and can transversely move on a main beam so as to realize ascending and descending vehicles; the bottom-storey translation vehicle-carrying plate is positioned at the bottom of the frame, is arranged on the underground rail, is provided with a dynamic running mechanism, and can slide on the underground rail; the vehicle warding frames are welded on the middle mechanism and the bottom-storey translation vehicle-carrying plate, so as to prevent vehicles on the upper side from accidentally sliding off and further causing damage to vehicles on the lower side. The efficient three-dimensional parking system has the characteristics of novel structure, simplicity and convenience in assembly, convenience in use, high vehicle storage capacity, safety, reliability and the like, and thus belongs to an efficient three-dimensional parking system integrating economical efficiency and practicability.