The utility model provides a manhole cover opening device, includes the cross arm, and the middle part of its characterized in that cross arm is connected with rings, and the one end of cross arm is equipped with crooked branch, and branch and rings are in the coplanar, and the one end of cable is connected with the triangle pull head, and the other end of cable passes rings and is connected with another triangle pull head, the utility model discloses during the use, it is downthehole and rotatory 45 earlier to insert opening of well lid with the triangle pull head, then with a lift by the stern subaerial in well lid one side, upwards lifts from the opposite side and to open the well lid, or two people lift up the well lid from the both ends of cross arm respectively, the utility model discloses have the security height, use shoulder strength to have an effect together by abdomen shoulder leg, avoid only drawing the well lid to cause pulled muscle by the pulling force, work efficiency is high, and it is convenient to handle to the condition that the well lid seal lock is dead, the well lid is marginal sticked with the base, install and small and exquisitely easily carry, be convenient for place on rushing to repair the vehicle, occupation space not after rolling the rope.