Multi-touch lower vehicle body repair welding tool

The invention discloses a multi-touch lower vehicle body repair welding tool, and belongs to the field of vehicle manufacturing tools. The multi-touch lower vehicle body repair welding tool comprises a base, a support, a rocker arm, a first pressing block, a switching block, a locating pin, a Y connector and an air cylinder. The rocker arm is of an L-shaped structure and comprises a main rod and a short rod. The main rod is hinged to the support through a pin shaft and in rigid connection with the air cylinder through the Y connector. A second pressing block and a third pressing block are fixed at the bottom end of the main rod, and a second locating block and a third locating block are arranged under the second pressing block and the third pressing block respectively. The first pressing block is perpendicularly fixed to the bottom end of the short rod, a first locating block is arranged at the lower end of the first pressing block and fixedly connected with the support through the switching block of an inverted J shape, and the locating pin is located on one side of the support. The multi-touch lower vehicle body repair welding tool is low in the requirements for skill levels of operators, easy and convenient to operate, high in adaptability, and suitable for lower vehicle bodies of multiple vehicles, and different products can be adjusted according to the production status.