Three-track-double-direction sliding door

The utility model relates to a three-track-double-direction sliding door which comprises an upper track, a lower track, a door frame and glass doors. Three parallel first sliding grooves are formed in the bottom end face of the upper track. Three parallel second sliding grooves are formed in the top end face of the lower track. The glass doors are arranged in the three first sliding grooves. The top portions of the glass doors are movably arranged in the first sliding grooves through upper clamps. The bottoms of lower clamps are movably arranged in the second sliding grooves through pulleys. A first glass frame and a second glass frame are arranged at the front end face and the back end face of a left side glass door respectively. A third glass frame and a fourth glass frame are arranged at the front end face and the back end face of a middle glass door respectively. A fifth glass frame and a sixth glass frame are arranged at the front end face and the back end face of a right side glass door respectively. Th