A novel infrared reflective device was proposed. The alignment direction of cholesteric liquid crystal particles in the device are driven by the diversion of host liquid crystal, which can realize the work state switch from infrared reflection to transmission. So the cholesteric liquid crystal particle is the key of this device. The preparation method of cholesteric liquid crystal polymer film was introduced, and the liquid crystal polymer particles were obtained by ultrasonic processor. The influence of different proportions crosslinker liquid crystal 1 on liquid crystal film brittleness and reflection band was studied. It was found that when the proportion of crosslinker liquid crystal 1 is 100%, the brittleness of liquid crystal film is maximum and the clear point is the highest. In addition, the reflection band of liquid crystal films is getting closer to shortwave with crosslinker liquid crystal 1 concentration increasing. At last, the influence of the liquid crystal film thickness on liquid crystal polymer particles was conducted. It was found that the size of liquid crystal polymer particles became smaller and evener with the film thinning. This work will support the optimization of electricity-responsive infrared reflective windows performance.