Sliding door

The embodiment of the utility model provides a sliding door, and provides a solution that a door frame is made of a closed-cavity broken-bridge profile with a hook, and a frame assembly is made of a closed-cavity broken-bridge profile, specifically, the sliding door comprises the door frame and a door leaf; wherein the number of the door leaves is at least two; the door leaves are arranged in a staggered mode. The door frame is provided with at least two rails; the door frame comprises door frame vertical frames vertically arranged on the two sides, a door upper frame horizontally arranged at the top of the door leaf and a door lower frame horizontally arranged at the bottom of the door leaf. The door edge vertical frame, the door upper frame and the door lower frame form a quadrilateral frame used for containing the door leaf. The outer ring of the door frame is connected with a civil engineering structure, and the inner ring of the door frame is connected with the door leaf; wherein the door frame is made o