Hinge for doors and windows

The utility model relates to the technical field of hinges, in particular to a hinge for doors and windows. Comprising a center shaft, a plurality of shaft barrels rotationally arranged on the center shaft in a sleeving mode, a first metal plate and a second metal plate, the first metal plate and the second metal plate are arranged on the two sides of the multiple shaft barrels, the first metal plate and the second metal plate are fixedly connected with the multiple staggered shaft barrels respectively, and a plurality of auxiliary assemblies allowing the shaft barrels to rotate smoothly are arranged at the joints of the center shaft and the shaft barrels. And limiting assemblies for limiting the movement of the metal plate I are arranged on one sides of the two shaft barrels connected with the metal plate II. According to the hinge for the door and the window, the central shaft and the shaft barrel rotate smoothly when the door and the window are opened and closed, and the safety performance of the door and