Detection jig for circuit board

The utility model discloses a detection jig for a circuit board, which comprises a bottom plate, a supporting seat is fixedly arranged at the top end of the bottom plate, a hydraulic rod is fixedly arranged in the middle of the inner wall of the top of the supporting seat, a fixing seat is fixedly arranged at the bottom end of the hydraulic rod, and detection needles are arranged on two sides of the bottom end of the fixing seat. A sliding groove is formed in the middle of the top end of the bottom plate, the bottom plate is slidably connected with two fixing plates through the sliding groove, one side of each fixing plate is movably connected with a limiting plate, the two sides of the top end of the bottom plate are both movably connected with a carrying plate, and the two limiting plates are driven by a bidirectional lead screw to move to limit circuit boards of different sizes. The limiting plate is tightly attached to the circuit board through the first spring, so that the circuit board can be more stabl