Automobile welding clamp

The utility model relates to the technical field of automobile welding, and discloses an automobile welding clamp which comprises a workbench, a placing plate is fixedly connected to the top of the workbench, rectangular grooves are symmetrically formed in the top of the workbench front, back, left and right, a first clamping mechanism is arranged at the top of the workbench, and second clamping mechanisms are arranged in the rectangular grooves. The second clamping mechanism comprises a sliding assembly and a rebounding assembly, the sliding assembly is arranged in the rectangular groove, and the rebounding assembly is arranged in the sliding assembly. Through a first clamping mechanism, an automobile body is placed on a placement plate at the top of a workbench, after the automobile body is well placed, a motor is started, a two-way screw rod rotates through the work of the motor, the rotation of the two-way screw rod enables a moving block to rotate, a clamping plate is further rotated, and the clamping pl