The invention discloses a high-precision automatic welding device for silicon steel sheets. The high-precision automatic welding device for the silicon steel sheets comprises a worktable with a feeding mechanism, welding stations arranged on the worktable, a welding mechanism and a sheet arranging mechanism, wherein the welding mechanism and the sheet arranging mechanism are arranged in correspondence to the welding stations. The feeding mechanism achieves alternative feeding through a dual-station feeding mechanism, and work efficiency is greatly improved; according to the welding mechanism,a lifting mechanism is adopted to drive a lifting rotating type welding gun mechanism, and a welding gun can be driven to rotate so as to implement inclined welding action; and a poking type sheet arranging mechanism is adopted as the sheet arranging mechanism, an ejector rod is adopted in the mechanism for upward poking the silicon steel sheets in an interference manner for pressing, and the silicon steel sheets can be pressed more tightly. In total, defects of an existing device in the prior art are overcome, the sheet arranging effect, work efficiency and welding precision are greatly improved, and the device is a relatively precise device, has multiple functions, and is very high in automation degree, and capable of saving enterprise production cost. Meanwhile, the quality of silicon steel sheet welding motor products of an enterprise is improved.