Pin pulling device for framework of switch transformer

The utility model discloses a switch transformer framework needle pulling device which comprises a needle pulling machine table and a framework workpiece, a groove position for containing the framework workpiece is formed in the middle of the needle pulling machine table in a penetrating mode, and limiting plates for positioning the framework workpiece are arranged on the two sides of the two ends of the groove position. During use, a workpiece is firstly placed in a groove position, then a second air cylinder works to drive a limiting plate to move, the limiting plate clamps the workpiece to position the workpiece, after positioning, an electric telescopic rod drives a shell to descend, pressing plates on the two sides and a fixing plate are moved between pins of the framework workpiece, and then a driving motor drives a positive and negative tooth lead screw to rotate; according to the needle pulling device, the pressing plates on the two sides can be driven to move towards the opposite side by rotating the