Automatic welding machine capable of improving accuracy of spool

The automatic welding machine comprises a workbench, the left side of the workbench is fixedly connected with a fixing plate, the right side of the fixing plate is fixedly connected with a welding device, the upper side of the workbench is fixedly connected with a rotating disc, and the upper side of the rotating disc is fixedly connected with a cone frustum. A top plate is arranged on the upper side of the workbench, the top plate is located on the upper side of the fixing plate, the top plate is fixedly connected with the workbench through a plurality of supporting rods, a control rod is connected to the upper side of the top plate through a connecting device, and a control plate is fixedly connected to the lower side of the control rod; a control groove is formed in the lower side of the control panel, and a threaded rod is rotationally connected into the control groove. Under the triple action of the cone frustum, the contact rod and the control panel, simple fixing operation on the spool is completed, th