The invention discloses a multi-reflection-band layered cholesteric liquid crystal composite film with the light response character and a process, and relates to an optical material capable of carrying out light control. The multi-reflection-band layered cholesteric liquid crystal composite film is formed by three layers of cholesteric liquid crystals in an overlaid mode, light with three wave bands can be reflected at most, and the wavelength of the light can at least range from 400nm to 2000nm. Reflection wave crests of one layer of cholesteric liquid crystal can move under irradiation of the light with the specific wavelength, and when the layer of cholesteric liquid crystal and reflection bands of the other two layers of cholesteric liquid crystals interact, the multi-reflection-band layered cholesteric liquid crystal composite film can have different optical effects. After a certain period of irradiation time, the light with a certain wave band can be totally reflected, total reflection can be disappeared through continuous irradiation, and conversion between different reflection states can be accurately controlled through the light with the specific wavelength. In addition, the initial state of the multi-reflection-band layered cholesteric liquid crystal composite film can be restored under the effect of the light or heat.