Suspended ceiling drilling auxiliary device

The utility model provides a suspended ceiling drilling auxiliary device which comprises a hollow fixed supporting rod arranged on a movable sliding plate, a lifting supporting rod with the lower portion arranged in the fixed supporting rod in a sliding mode, an electric drill arranged at the upper end of the lifting supporting rod and a transmission assembly located on one side of the lifting supporting rod. The transmission assembly comprises an upper tooth-shaped fixed pulley provided with a crank handle, a chain and a lower tooth-shaped fixed pulley located below the upper tooth-shaped fixed pulley. The chain is connected with the upper tooth-shaped fixed pulley and the lower tooth-shaped fixed pulley and fixedly connected with the bottom of the lifting supporting rod so as to provide power for movement of the lifting supporting rod. A sliding groove and a protruding strip which are matched with each other are arranged between the outer wall of the lifting supporting rod and the inner wall of the fixed su