The concepts of polymer dispersed liquid crystal and strained liquid cr ystal are introduced,and the experimental study on the bend scattering polarization effect of polymer dispers ed liquid crystal film is given. The polymer dispersed liquid crystal electric-controlled switchable film sample is prepared.The haze of the scattering state is more than 90%,the transmittance of the transparent state is close to 80% when the electric field is applied,and the maximum transmittance of the translucent state is more than 30% when bending stress is applied.When the sample is curved,it has the function of scattering polarizer,and the light axis is in the curved cylinder bus direction.The test c urves of transmittance,haze and polarizing efficiency varying with the curvature radius of the sample are given.Based on t he principle of bending scattering polarization effect,it is considered that the bending stress makes th e bipolar connection of the bipolar configuration have a general surface orientation along the bending di rection,and the liquid crystal molecules in the liquid crystal droplets have a general orientation along the su rface.It induces that the refractive index of liquid crystal is equal to that of the polymer perpendicu lar to the bending direction,which leads to the polarizing light to be transparent.The refractive index of liquid c rystal is different from that of the polymer parallel to the bending direction,w hich causes the polarizing light to be scattering.