The invention relates to a winch on-off machine used for starting a vertical lifting civil defense door, and belongs to the field of hoisting equipment. The winch on-off machine used for starting the vertical lifting civil defense door comprises a left roll device, a right roll device, a manual clutch protecting device, a lifting motor, an alternating current brake, a speed regulator, a speed reducer, transmission shafts, a rigid coupler, a combined type stroke measurement and controlling device, pinions, low-speed end safe protecting devices, big gears and a hand rocking device, wherein one end of the speed reducer is provided with the transmission shafts in a penetrating mode; the multiple transmission shafts are connected into a whole axially through the rigid coupler; the pinions are arranged at the two ends of each transmission shaft and are engaged with the big gears; the big gears are connected with the left roll device and the right roll device respectively; one sides of the big gears are provided with the low-speed end safe protecting devices; and the manual clutch protecting device, the lifting motor, the alternating current brake, the speed regulator and the hand rocking device are axially arranged at the other end of the speed reducer. The winch on-off machine used for starting the vertical lifting civil defense door is safe in operation, free of a desynchrony problem and applicable to a large-span and large-size structure.