The utility model provides a well fixing cement head, including cementing -head body, well cementation plug, case, pneumatic actuator, the cementing -head body is equipped with first through -hole, the case sets up in the constitution first through -hole on the inner wall of cementing -head body, the well cementation plug set up in in the first through -hole and lie in the top of case, be equipped with the second through -hole in the case, the internal diameter of second through -hole is greater than the big footpath of well cementation plug, one side of case is connected with the connecting rod, the connecting rod passes the wall body of cementing -head body with pneumatic actuator connects, the case can pass through the connecting rod is in pneumatic actuator's drive is down at the perpendicular to the flat rotation in surface of the axis of first through -hole, the case can make at the rotation in -process the dead in line of first through -hole and second through -hole or form certain contained angle. The utility model discloses create simple structure, convenient to use, can long -range action realize the release plug, reduce the construction risk.