The electric power tower pole joins a crack the welding apparatus is automatically a set of highly effective general awl tube, the circular pipe, the polygon awl tube longitudinal seal welding special purpose equipment, will join a crack and the welding combines, realizes the function which on an equipment on the one hand joins a crack to the work piece, on the other hand welds. Makes the work efficiency to enhance to conventional method 3-5 times; Uses the CO2 gas to guarantee welds with the submerged-arc welding two way welding, has the welded joint to regulate the function automatically, guaranteed that the welding torch to, the welding carries on automatically precisely, does not need the hand regulation, the welded joint formation is artistic. The especially qualify lightpost, the awl tube and the electric power poles and towers manufacture enterprise's production need, the performance-to-price ratio is extremely high. Suits from 60mm to the 800mm diameter tower pole.