Jig special for laser welding

The invention relates to a jig for welding, in particular to a jig special for laser welding. The jig special for laser welding is provided with a base plate, a strip-shaped protective gas groove allowing protective gas to enter in order to obtain protective atmosphere in the welding process is formed in the base plate, clamping plates used for fixing materials to be welded to the base plate are arranged on the base plate, and the clamping plates are detachably fixed to the two sides of the protective gas groove. The cross section of the protective gas groove is in an arc shape, and one end, close to the protective gas groove, of each clamping plate is arranged in a step shape. Accordingly, impurities like accumulated welding slag in the protective gas groove due to long-term use can be cleared out easily, and the impurities can be cleared out through slight blowing or striking the base plate by enabling the protective gas groove to be erected. In addition, one end, close to the protective gas groove, of each