Defect detection device for high-precision metal material

The utility model discloses a defect detection device for high-precision metal materials, which comprises a defect detection device body, a base and a display panel, and the front side of a movable plate is in threaded connection with a transmission component through a threaded hole. Through the arrangement of the movable plate, the first clamping plate and the limiting assembly, when a workpiece is detected, the workpiece is firstly placed at the top of the first clamping plate, and then an operator starts the transmission assembly, so that the transmission assembly drives the first clamping plate and the second clamping plate on the movable plate to get close to each other through the limiting assembly to clamp and position the workpiece; therefore, the workpiece detection accuracy of an operator can be improved, and the problems that the operator needs to determine the detection position with naked eyes and then place the workpiece to detect the surface of the workpiece due to the fact that existing equipm