PCB board fixture is a detection device for PCB boards, especially a fixture for PCB board detection. There is a fixed seat set on the machine base that can slide back and forth, a front gear lever and a rear gear lever set on the fixed seat. The front gear lever is fixedly connected to the fixed seat, and the rear gear lever is slidably connected to the fixed seat. The front gear lever is equipped with a PCB board clamp head composed of a warping plate and a top plate, and the middle part of the PCB board clamp head is connected to the front gear lever pin, and a top rod device is set at the front end of the machine base, The top rod device is composed of a base fixed on the machine base and a top rod set on the base. When the fixed base moves to the forefront, the top rod of the top rod device contacts the top plate. The utility model has a simple structure and can conveniently and quickly clamp the PCB board, improving work efficiency. At the same time, the clamping of the PCB board is also relatively stable, ensuring that the camera captures clear images of the PCB board, thereby improving the accuracy of PCB board detection.