Connecting structure and mounting method of sliding door and window

The invention provides a connecting structure of a sliding door and window, which comprises a plurality of sliding rails arranged side by side; the sliding rail is located at the top of the door and window frame and used for being installed on a wall of a door and window and providing bearing force for the whole door and window sash. The additional part is correspondingly arranged below the sliding rail; the pulley assembly is arranged between the sliding rail and the additional part, so that the additional part can slide along the sliding rail; the linkage assembly is arranged on each additional part, so that when one additional part slides, other additional parts are linked to slide; the sliding sash is detachably connected with the additional part, and the sliding sash and the additional part slide synchronously. By adding the additional part, redesigning the linkage assembly structure and installing the linkage assembly structure in the groove of the additional part and detachably connecting the additiona