Combined arm head device of crawler crane

The utility model discloses a combined arm head device of a crawler crane. The combined arm head device comprises an arm head frame, a pulley block is mounted at the front end of the arm head frame; a guide pulley is mounted at the rear end; a fixed fly jib supporting rod connecting hole, a fixed fly jib rear anti-roll rod connecting hole, an anti-roll supporting rod connecting hole and a fixed fly jib connecting hole are symmetrically formed in the two sides of the upper part of the fixed fly jib body from back to front respectively; and a plurality of transition arm connecting holes are formed in the lower end. By means of the combined arm head device, the crane is provided with the main arm lifting hook and the fixed auxiliary arm lifting hook at the same time, the two working conditions of the main arm and the fixed auxiliary arm can be met at the same time, installation time is shortened, production cost is reduced, and production efficiency is improved. The device is simple in structure and reasonable i