The utility model discloses a full -automatic looper butt welding all -in -one, including: welded platform, the band module of seesaw sets up on welded platform, the seesaw send a ring module, set upon welded platform and with the band module just to the cooperation, relative motion's iron ring clamping mechanism slider about two, parallel are just to setting up, mould on two bands, separately respectively with an iron ring clamping mechanism slider rigid coupling, two band lower moulds, with mould relative up -down cooperation on the band set up and separately respectively with an iron ringclamping mechanism slider about swing joint, adjust the adjustment mechanism of the upper and lower movable stroke of band lower mould, be connected with the band lower mould, welding electrode sets up respectively on the band on mould and the band lower mould, circuit control module is with the band module, send mould on a ring module, the band, band lower mould and the equal electric connectionof welding electrode. The utility model discloses a full -automatic looper butt welding all -in -one welding is accurate and the weld bond is neat.