The invention discloses an efficient silent impeller machine. The impeller machine comprises a machine body with a blast cavity and an air cone, the air cone is provided with an air guide cavity, and the left end of the air guide cavity is small and the right end of the air guide cavity is large, and the air cone is detachably connected with the machine body. The machine body and the air cone can be processed independently and also can be independently replaced during maintenance, and the air cone can be stacked and stored, so that the storage space is small and the transportation cost is low. An impeller is arranged in the air guide cavity, blade bodies are arranged on the impeller; the blade bodies comprise root edges, front edges, top edges and rear edges, root arcs, average arcs and top arcs of the blade bodies project on the root conical surfaces, the average conical surfaces and the top conical surfaces respectively to form the root edges, average control lines and the top edges, the whole shape of each blade body is determined by the root edge, the average control line and the top edge. According to the comparison of experimental results, the efficiency of the fan can be greatly improved, and the specific A-weighted sound level can be reduced. The efficient silent impeller machine is used for mixed flow impeller machines.