Casting tool for rocker arm shell of drum shearer

The invention discloses a casting tool for a rocker arm shell of a drum shearer, the rocker arm shell of the drum shearer comprises a planet head mounting cylinder, a motor cylinder and an arm frame connected between the planet head mounting cylinder and the motor cylinder, a reinforcing rib is arranged between the motor cylinder and the arm frame, and the motor cylinder and the arm frame are integrally formed. A first dead head is arranged above the planet head mounting cylinder, a second dead head is arranged on the side surface of one side, close to the arm support, of the motor cylinder, a third dead head is arranged above the reinforcing rib, a fourth dead head is arranged above one side, far away from the arm support, of the motor cylinder, and a fifth dead head is arranged above one side, far away from the arm support, of the motor cylinder. A fifth riser is arranged above the middle position of two shaft holes in the coal wall side of the arm support, a sixth riser is arranged above the middle positio