Quad flat no-lead (QFN) substrate detection jig

The utility model discloses a quad flat no-lead (QFN) substrate detection jig, which comprises a bottom plate, a hollow detection port corresponding to the center of a quad flat no-lead (QFN) substrate is arranged in the center of the bottom plate, supports are respectively arranged on two sides of the bottom plate in parallel, slots for inserting and limiting the quad flat no-lead (QFN) substrate are respectively and correspondingly arranged on the inner sides of the bottoms of the supports on the two sides, and the supports on the two sides are respectively L-shaped. And the guide rails are symmetrically distributed on two sides of the bottom plate. The hollowed-out detection opening is used for directly turning over the surface to detect the back surface after the front surface of the product substrate is detected in the clamp. The supports on the two sides are respectively in an L shape and are used for limiting movement of the base plate by being combined with the inserting grooves. According to the util