The air-tight sliding door is hand-pulled (left and right door). The air-tight sliding door surface is stainless steel panel, metal door frame, thermal insulation polyurethane inner layer, neoprene rubber door air-tight seal, the door with a vacuum double-layer thermal insulation observation window, the design of the use of an eccentric mechanism door lock system with electrostatic galvanized steel pulley, just pulley with ball bearings.