A polarization sounding scheme of airborne lidar is proposed, in which the polarization sounding “bottle-neck” channel i.e., the perpendicular sounding channel in the traditional scheme is obliterated. Return signal differences between 532 nm depolarization sounding channel and 532 nm polarization parallel sounding channel can be minished in the polarization sounding courses. The energy ratio of two channels, return signals can be adjusted. This scheme strengthens the polarization sounding capacity when it has the same energy as first scheme. It can reduce the photomultiplier (PMT) saturation probability when cirrus is sounded by 532 nm polarization channel. This scheme also can reduce laser energy and actualize genuine 532 nm and 1064 nm dual-wavelength sounding.