Multi-point lock sliding door and window and mounting method thereof

The invention discloses a multi-point lock sliding door and window and mounting method thereof. The multi-point lock sliding door and window comprises an auxiliary frame and a door-and-window frame, the auxiliary frame is a rectangular frame, and the door-and-window frame is arranged on the inner side of the auxiliary frame, the top part and the bottom of the door-and-window frame are respectively in contact with the auxiliary frame; two second mounting grooves are arranged on two sides of the door-and-window frame, and two second mounting grooves are respectively located on the top part and the bottom of the door-and-window frame, slidng rails are arranged horizontally on the inner walls of the bottoms of and on the inner walls of the top parts of the second mounting grooves, and locking pillars are arranged between two slidng rails, and the top parts and the bottoms of the locking pillars are respectively slidingly connected with the slidng rails, one end of the locking pillars near the auxiliary frame exte