The invention relates to a composite circular motion power generation method and a device thereof. The device is mainly a power generation device which is driven by compound gear train circular motion triggered by a drive source per se, or a wheel body drawn or driven by the drive source and the wheel body per se or related wheel bodies, can be used in various electric vehicles or form an independent generator set, and form an independent generation device, an independent power supply device and an independent electric storage device by matching lead wires, electronic circuit control systems, suitable seed power supplies, protective circuits, electric storage facilities and the like.