The effect of target scattering property on laser radar echo characteristics is the base of laser radar active imaging,target tracking and recognition. Firstly,considering the spatial and temporal distribution of detecting laser,the laser radar echo formula is derived. The 3D models of three typical targets are established by 3DS MAX software,and their echo peak value sequences in different angles are simulated by using the BRDF model corresponding to monostatic laser radar,then their echoes are obtained under three different surface material conditions. Based on this,the influence of target scattering property on laser radar echo characteristics is analyzed,and it can provide theoretical references for laser radar active detecting and imaging.