Semi automatic strip shear with automatic shear, alignment, pressing and welding of welding machine, the need for manual completed only in the feed. The machine is light and flexible, easy to use, suitable for small and medium size welded tube, cold-formed steel production line, especially in the docking of narrow strip, more incomparable advantages. Due to the welding process to achieve a stylized, automation, made it difficult for manual welding to be easy, easy to operate.