Polysiloxane side-chain liquid crystalline polymers(PSLCPs)are a class of liquid crystal polymer that branches liquid crystal monomer or special functional group to the siloxane main chain through a crosslinking reaction. Due to the soft and flexibility of the siloxane main chain and the photo-/thermo-/electric response characteristics of functional groups, polysiloxane side-chain liquid crystalline polymers are widely used in optical information storage, nonlinear optics, image display, chromatography, current change, etc. In this paper, the research progress made by polysiloxane side-chain liquid crystalline polymers in the fields of wide-band reflection, flexible photo response devices, flexible optical paints and stress/electrical response devices are reviewed and discussed, and the future development trends is forecasted.