The polarization properties of 1-D laser holography photonic crystal are investigated with the eigen matrix.The results showed that when increasing the incident angle,the width of the band gap of s-polarized light enlarges and the edges become steep.The case of the band gap of p-polarized light is contrary to that of the s-polarized light.When increasing the incident angle,the wavelengths of the band gap edges of both s-polarized and p-polarized light decrease nearly according to the parabolic law.The shape of the parabola of s-polarized light is steeper than that of p-polarized light;In particular,when the incident angle is large enough,there are several very narrow transmission peaks in the left side of the band gap of s-polarized light,and when the incident angle changes slowly,they will change quickly.The results are helpful for the study and application of 1-D laser holography photonic crystal.