Cloud-aerosol lidar with orthogonal polarization(CALIOP) can emit 532 nm and 1064 nm laser pulses which is mainly used for the detection of clouds and aerosols in the atmosphere. The 532 nm laser pulse can be used to get backscatter signal below the sea surface due to a good penetrability to the ocean surface. Based on the CALIOP data, the directly extracted signal and the corrected transient response signal of subsurface are studied. Firstly, the subsurface backscatters are calculated. Then the marine particulate backscattering coefficients are retrieved from two different methods, and compared to particulate backscattering coefficients from moderate-resolution imaging spectroradiometer(MODIS) products. The mean of difference value of particulate backscattering coefficients are 0.0035 and 0.0027,and the standard deviation are 0.4004 and 0.0042 respectively, which indicates that particulate backscattering coefficients derived by using transient response correction method is closer to MODIS products.