Mounting device for gas bag containing gas circuit and circuit cable and operation method of mounting device

The invention discloses a mounting device for a gas bag containing a gas circuit and a circuit cable and an operation method of the mounting device. The mounting device comprises a bracket, a spanner,a supporting plate, a positioning plate and two supporting seats, the two supporting seats, the positioning plate and the supporting plate are mounted on the bracket, and the two supporting seats areparallelly arranged on the same side of the supporting plate and are parallel to the supporting plate; dovetail grooves are formed in the centers of the bottoms of the supporting seats and matched with the positioning plate to realize positioning of the supporting seats; the upper surfaces of the supporting seats are smooth arc surfaces, grooves are formed in the two ends of the supporting seats,idler wheels are arranged in the grooves, and the idler wheels are higher than the top faces of the supporting seats; the spanner is mounted on the supporting plate and arranged perpendicular to thesupporting plate; and a plug