The invention discloses a rear power-assisting intelligent driver. A universal wheel comprises a wheel hub, end covers are fixed to openings in the two ends of the wheel hub respectively, the two endsof an electric driving mechanism penetrate through the end covers respectively and are supported on the end covers, and at least two rows of running pulleys which are arranged in the circumferentialdirection of the wheel hub are movably assembled on the circumference of the wheel hub. The rear power-assisting intelligent driver further comprises a shell, supporting arms which extend in the axialdirection of the shell are symmetrically arranged at one end of the shell, an assembly space is formed between the two supporting arms, after the universal wheel enters the assembly space between thetwo supporting arms, the two ends of the electric driving mechanism are connected with the supporting arms respectively, the other end of the shell is used for being hinged to the rear portion of a wheelchair, and the universal wheel is in contact with the ground under the effect of gravity; a storage battery is arranged in the shell; a controller is located in the shell and is electrically connected with the storage battery, and the output end of the controller is electrically connected with the electric driving mechanism. The rear power-assisting intelligent driver is assembled at the rearportion of the wheelchair to assist the wheelchair in running, and does not influence the comfort of the wheelchair.