Abstract: Based on the principle of reflected polarized light with various reflectances when it enters on dielectric interface at different oblique incidence angles, an adjustable laser attenuator working at 1 064 nm wavelength was designed, with 6 angle accurate, 100 W/cm2 (continuous-wave) and 0.1 J/cm2 (10ns pulses) damage threshold. The transmittance of attenuator was measured,the range of transmittance was 8.510-5～1. And the effect factors for propagation beam quality caused by attenuator were investigated. Finally, the suggestion for improving the performance of the attenuator was discussed.