Large-scale passenger car full-automatic energy-saving curtain

The utility model discloses an automatic energy saving curtain for large passenger car. Purpose of the utility model is to provide an energy saving curtain that can save energy, reduce transport cost, be favorable for environmental protection and be convenient for operation. Rotary wheels are set in chutes on the two sides respectively, wheel shafts of the two rotary wheels are connected with a main hoisting pole respectively, there is a curtain on the main hoisting pole, upper part of the curtain is connected with a curtain shaft, the curtain shaft is on two brackets, the two brackets are fixed on car body on upper part of the chute respectively, a transparent window is set in the middle of the curtain. A curtain mechanism is set on the curtain shaft. The curtain shaft is connected with a rotary motor by a transmission mechanism, and the rotary motor is connected with a travel switch. During no-load, temperature in driving cab can be adjusted by only starting a small air compressor that is installed on an engine so as to avoid unnecessary waste of fuel and energy, to save transport cost and to be favorable for environmental protection.