Automatic welding device for steel structure shell

The automatic welding device for the steel structure shell comprises a working plate, a groove is formed in the top of the working plate, a moving plate is movably connected into an inner cavity of the groove, a handle is fixedly connected to the right side of the moving plate, the moving plate can be driven to move through movement of the handle, and a first sliding groove is formed in the inner wall of the groove; first sliding blocks are fixedly connected to the front face and the back face of the movable plate and arranged in inner cavities of the first sliding grooves. According to the welding device, when welding operation needs to be carried out, the handle is pulled to enable the moving plate to move rightwards, after the moving plate is moved out, a welding object is placed on the top of the supporting plate and fixed, and then the handle is pushed to push the moving plate back to the bottom of the welding gun. Through the pull-out structure of the movable plate, the loading and unloading process of