Blue phase liquid crystals (BPLCs) promise great potential application in field sequential displays,phase modulator devices,and three-dimensional (3-D) tunable photonic crystals owing to their interesting features,such as sub-millisecond response time,self-assembly molecule structure and optical isotropic status in the absence of electric field,after their temperature range has been broaden to more than 60 ℃ by introducing polymer networks into the declinations.However,some issues,such as hysteresis effect,residual birefringence,and high driving voltage,must be resolved before they can be widely applied.The polymer network plays an important role to effect the electro-optic properties of polymer-stabilized BPLCs(PS-BPLCs).In this report,we will show our recent research on polymer effect on BPLCs.