Door and window capable of preventing hardware from loosening and air leakage

The invention relates to the technical field of door and window processes, and discloses a door and window capable of preventing hardware from loosening and air leakage, which comprises a window frame, a first sliding groove is formed in the window frame, a hardware telescopic frame is rotatably connected in the first sliding groove, and a window sash is hinged to the top of the hardware telescopic frame; extension shielding assemblies used for shielding sunlight and preventing wind erosion are symmetrically arranged on the two sides of the window frame, and a cleaning assembly used for cleaning hardware and guaranteeing dryness of the hardware is arranged in the window frame. The gap between the window sash and the window frame can be shielded through the protection plate, outdoor sunlight is prevented from directly irradiating the hardware telescopic frame between the window sash and the window frame, and the problem that under long-time sunlight irradiation, the hardware telescopic frame is subjected to th