Double-track sliding door

The utility model discloses a double-track sliding door which comprises an upper border, a lower border, two upper door frames and two lower door frames, wherein two guides are arranged below the upper border; the upper edges of the two upper door frames are located in the guides respectively; two tracks are fixed on the lower border; two slide grooves located on the tracks are formed below the lower door frames; an internal clamp groove and an external clamp groove are formed at contact places between the upper door frames and the guides respectively; clamp grooves are formed at contact places between the upper border and the upper door frames; ethylene-propylene diene copolymer strips are clamped in the clamp grooves respectively; a flange is arranged on the inner side of the lower border; a clamp groove is formed at a contact place between the flange and one lower door frame; and an ethylene-propylene diene copolymer strip is clamped in the clamp groove. The double-track sliding door is good in sealability