The invention relates to a double-power driving device for a washing machine. The device comprises a direct-drive direct-current brushless motor and a double-power transmission mechanism, wherein the double-power transmission mechanism comprises a planet gear mechanism and an electromagnetic clutch, and can convert one power output into two power outputs; a stator of the motor is fixed on a lowershell of the transmission mechanism, and is directly connected to a driving shaft of the transmission mechanism; the other end of the driving shaft is a power output end and is connected to an impeller of the washing machine; a driving shaft sleeve is rotationally and coaxially arranged outside the driving shaft, an inner barrel of the washing machine is connected to the upper end of the driving shaft sleeve, and an external gear ring of the planet gear mechanism is connected to the lower end of the driving shaft sleeve; and the driving shaft and the driving shaft sleeve are controlled to rotate in the reverse direction or the same direction by controlling the electromagnetic clutch so as to complete the switching of a washing mode and a dehydration mode. The transmission device has a compact structure, and can save space and reduce cost and noise.