Pressing mechanism of automobile welding fixture

The utility model relates to the technical field of pressing mechanisms, in particular to a pressing mechanism of an automobile welding clamp, and solves the problem that a plane contact type pressing mechanism cannot adapt to the arc-shaped outer wall of a pipeline. A pressing mechanism of an automobile welding clamp comprises a mounting frame, a supporting seat is fixedly connected to the top of the mounting frame, a movable rod is rotationally connected to the inner side of the supporting seat, a fixing frame is fixedly connected to the side, away from the supporting seat, of the movable rod, and a sliding seat is arranged on the inner side of the fixing frame; two pressing rollers distributed in a bilateral symmetry mode are arranged at the bottom of the sliding base, the horizontal distance between the two pressing rollers is larger than the radial size of the pressing rollers, two side plates distributed in a bilateral symmetry mode are arranged on the outer sides of the pressing rollers, and the pressi