A new approach of spatial filter was performed and the feasibility of volume Bragg gratings to be spatial filter was analyzed. Based on Kogelnik’s theory of one dimensional coupled waves, the main factors that affect diffraction efficiency and angular selectivity of volume Bragg gratings were discussed. With holographic method, volume Bragg grating was recorded into a photopolymer, and then the experiment on spatial two dimensional low-pass filter of laser beam was fulfilled. The experimental results show that: extending exposure time, in the media’s saturation range, may improve diffraction efficiency, and increasing the incident angle may enhance angular selectivity, whereas because of absorption, diffraction efficiency would be decreased. Therefore, when fabricated volume Bragg gratings are used for a spatial filter, the diffraction efficiency and angular selectivity should be simultaneously considered.