Rapid switching device of fixtures and for robot welding

The utility model discloses a rapid switching device of fixtures and for robot welding. The rapid switching device comprises two columns; a rollover shaft which is arranged between the two columns is provided with a mounting plate; the surface of the mounting plate is provided with a plurality of threaded holes which are used for fixing the fixtures; the surface of the mounting plate is also provided with two pin holes; the surface of the back side of the mounting plate which is arranged at the positions of the pin holes is provided with pin sleeves; positioning pins which penetrate the pin holes are arranged in the pin sleeves. According to the rapid switching device of the fixtures and for the robot welding, the mounting plate is provided with the two pin holes, the back side of the mounting plate is provided with the pin sleeves which are the same with the pin holes in position and size, the positioning pins penetrate the pin sleeves and the pin holes, and accordingly positioning can be performed on the fixtures through the positioning pins when the fixtures need to be replaced and the fixtures can be fixed on the mounting plate through bolts. In addition, the pin sleeves and the positioning pins are provided with lock holes so as to prevent the positioning pins from falling off, pins are inserted into the lock holes, and accordingly the positioning pins and the pin sleeves can be fixed.