The invention relates to the technical field of end socket welding, and particularly discloses an end socket welding device. The end socket welding device comprises a rotary table, at least two end socket positioning clamps are symmetrically arranged on the rotary table around the rotary center, two welding robots are arranged on one side of the rotary table, disc positioning clamps corresponding to the end socket positioning clamps in number are arranged on the rotary table, each end socket positioning clamp corresponds to one disc positioning clamp, a supporting frame is arranged at the top of the rotary table, the disc positioning clamps are fixedly installed on the supporting frame, the disc positioning clamps are used for positioning discs on end sockets, and a jacking air cylinder is arranged at the bottom of the supporting column and used for jacking the supporting column. The end socket welding device has the advantages that the rotary table is provided with multiple stations, each station is provided with one end socket positioning clamp and one disc positioning clamp, welding can be conducted during feeding and discharging through the multiple stations, therefore, the welding efficiency is improved, manual welding is replaced, and the manufacturing cost is reduced.