The invention discloses a mute sliding door. The mute sliding door comprises sliding door bodies, a sliding door upper sliding groove, a sliding door lower sliding groove, upper pulley components, lower pulley components, arc-shaped convex caps and screws, wherein the sliding door upper sliding groove is located above the sliding door bodies; the sliding door lower sliding groove is located underthe sliding door bodies; two lower pulley components are arranged; the lower pulley components are respectively mounted at two ends of the lower parts of the sliding door bodies and are mounted on thesliding door bodies through the screws; the sliding door bodies are mounted in the sliding door lower sliding groove through lower pulleys. The mute sliding door is mute and noise-free in the using process; meanwhile, precautionary measures are arranged, so that the situation that the fingers are pinched when closing the sliding door can be avoided. The mute sliding door is simple in structure and convenient and smooth in operation.