Door and window hinge capable of being folded and opened by 180 degrees

The utility model provides a door and window hinge capable of realizing 180-degree folding opening, which relates to the technical field of hinges, and comprises a rotating pin and a control structure, the surface of the rotating pin is rotatably connected with two hinges, the surface of the rotating pin is provided with the control structure, the control structure comprises two limiting blocks, and the limiting blocks are arranged on the rotating pin. The two limiting blocks are fixedly connected with the two ends of a rotating pin correspondingly, positioning blocks are slidably inserted into the two limiting blocks and are of an L-shaped structure, rectangular plates are slidably connected to the surfaces of the positioning blocks, bolts are inserted into the positioning blocks in a threaded mode, inserting holes are formed in the surfaces of the positioning blocks, and the rectangular plates are connected with the inserting holes in a threaded mode. Insertion rods are slidably inserted into the limiting b