The utility model discloses a double -deck self -balancing cable constant temperature curtain system, its technical scheme main points are: include inboard curtain and outside curtain, be equipped with vertical bearing bar, horizontal support pole and stabilize the cable wire between inboard, the outside curtain, stabilize the cable wire and follow last spaced and inboard curtain and outside curtain fixed connection extremely down and constitute the diamond structure. The utility model provides a present not high problem of its structural stability of double layer curtain wall, in addition, set up attemperator between inboard, outside curtain, freeze or heat the air in curtain intermediate level to form the one deck heat preservation, make the temperature of the inboard building of curtain invariable relatively, do not receive ambient temperature's influence, reach homothermal effect, to sum up, reach 80% energy -conserving effect.