The invention discloses a milky white quartz tube. The milky white quartz tube comprises a first tube plug, a tube body, a second tube plug, a mullite fiber layer and an inner tube, wherein the firsttube plug and the second tube plug respectively sleeve outer walls of an upper end and a lower end of the tube body, the inner tube is arranged in an inner cavity of the tube body, an air inlet tube and an air outlet tube are respectively arranged at two ends of the inner tube, a rubber plug is arranged on outer wall of one side of the air inlet tube and the air outlet tube by a connection rubberbelt, the mullite fiber layer is arranged in the first tube plug, a polyurethane layer is arranged at one side of the mullite fiber layer, and a heat isolation material layer is arranged at one side of the polyurethane layer. The tube plugs are arranged outside the milky white quart tube, heat reflection layers are arranged in the tube plugs, heat can reflected back to the tubes when being radiated onto the heat reflection layers of the tube plugs during heating, so that the thermal efficiency in the tube can be improved.