Abstract:Range-gated laser imaging in three-dimensional is a high accuracy three-dimensional imaging method,which is not susceptible by the environment. so it has high application value in the field of identification and reconnaissance. In this paper,principles and characteristics of time-slicing 3d imaging and super-resolution 3d imaging,which are based on range-gated technique,are introduced,respectively. Later,developments and current situations of time-slicing 3d imaging method,super-resolution 3d imaging method and exponential coding 3d imaging method are summarized. Finally,superiorities and prospects of range-gated laser imaging in three-dimensional are discussed.