Automobile part automatic measurement plane surface precision testing fixture

The utility model relates to the technical field of automobile part detection. The utility model further discloses an automatic measurement plane surface precision testing fixture for the automobile parts. Workbench, a first supporting rod is fixedly installed on the upper end face of the workbench. A reciprocating lead screw is rotationally installed on the upper end face of the workbench. And atooth block and an adjusting rod are fixedly installed on the two sides of the connecting block correspondingly, a second supporting rod is fixedly installed on the upper end face of the workbench, amotor is fixedly installed on the side of the second supporting rod, a telescopic rod is movably installed below the cam, and the output end of the telescopic rod is movably connected with a connecting rod. The cam is driven by the motor to rotate; the cam drives the upper end of the connecting rod to rotate, the connecting rod enables the sleeve to move up and down on the outer wall of the reciprocating lead screw through