PCB (Printed Circuit Board) positioning stroke-limiting hot-pressing jig

The utility model belongs to the technical field of welding equipment, and particularly relates to a PCB (printed circuit board) positioning stroke-limiting hot-pressing jig, which solves the problems of difficulty in taking out and low working efficiency in the prior art, and comprises a base and a top plate, the four guide columns are jointly and movably sleeved with a pressing plate, the bottom of the pressing plate is fixedly connected with a heating plate through screws, the top of the base is fixedly connected with two symmetrically-arranged limiting sleeves through screws, and the bottom of the pressing plate is fixedly connected with a limiting rod through screws. After the workpiece is machined, the air cylinder drives the pressing plate to move upwards, due to the action of the spring, the first rack moves upwards, the first rack drives the gear to rotate, the gear drives the second rack to move, and therefore the push block moves along with the first rack to push the workpiece outwards, and automat