Polarization sensitivity is one of the main performance characterization indexes for advanced remote sensing instruments. It is very important in the quantification of high-precision remote sensing information extraction. Optical film is a very important means for controlling the polarization sensitivity of remote sensing instruments. On the basis of the theory of transfer matrix of optical films, the design, analysis and development of several types of optical films including metal reflective film, dielectric-metal-dielectric edge filtering film, dielectric edge filtering film, antireflection coating and band-pass filtering film are carried out according to the control requirements of polarization sensitivity. The measured results of polarization sensitivity of some coated optics and the actually controlled polarization sensitivity of the remote sensing instrument systems using those coated optics are given.