The invention discloses a high-end welding device, which comprises a socket and a plug connected with a welding machine, wherein the plug is internally provided with a right-orientated inserting cavity, the upper and lower inner walls of the inserting cavity are symmetrically provided with first steering cavities, each first steering cavity is rotatably provided with a toothed wheel through a first steering shaft, the front end face of each toothed wheel is provided with a bevel gear ring, the upper and lower parts of the plug are symmetrically provided with second steering cavities at the left side of the inserting cavity, a second steering shaft is rotatably installed between the first steering cavity and the corresponding second steering cavity in a matched manner, the second steering shaft in each first steering cavity is fixedly provided with a first conical edge wheel connected with the bevel gear ring is a matched manner, the second steering shaft in each second steering cavityis fixedly provided with a first driving wheel, the upper and lower parts of the plug are symmetrically provided with first sliding slots which are located t the right sides of the second steering cavities, and each first sliding slot is provided with a sliding block which is slidably installed in a matched manner.