Expressway engineering quality automatic detection device

The utility model discloses an automatic highway engineering quality detection device, which relates to the technical field of highway engineering detection equipment and comprises a mounting frame, a support frame is fixedly connected inside the mounting frame, two symmetrically distributed support plates are arranged on one side of the support frame, each support plate is of a U-shaped structure, and the left side of the mounting frame is provided with a left side face. The bottom end of one side of the supporting plate is fixedly connected with a fixing plate, and the middle of the upper surface of the fixing plate is movably connected with a movable seat through a spring telescopic rod. The extending plate is arranged on one side of the supporting frame, the square rod is arranged on one side of the extending plate, the idler wheel is arranged at the bottom end of the square rod and can be attached to the ground, the marking pen is arranged at the top end of the square rod and can mark lines on recording