The utility model relates to an auxiliary pushing device of a hydraulic support. The pushing device comprises a pushing device body, anchor rods and single hydraulic props. The pushing device body comprises long-strip-shaped I-shaped steel. A column socket for mounting a single hydraulic prop is arranged at one end of the I-shaped steel; side plates are respectively arranged on two sides of the bottom of the other end; at least one screw hole is formed in the side plate; the coal seam roof connecting device is simple in structure and convenient to use, replaces a manual roof connecting mode adopted for solving the pushing problem of a hydraulic support in a high caving area of a coal mine in the prior art, eradicates the risk of roof and climbing roof connecting operation, and is safe, andthe processing cost is greatly reduced.