3D laser imaging technology has many advantages for the other optical imaging means,and has wide application prospect in many fields such as reconnaissance,topography,navigation and guiding.With the development of laser and detector technology,a novel laser imaging technology based on 3D detector array has developed rapidly in recent years.Its key parts include the Geiger-mode avalanche photodiode detector FPA,diode-pumped microchip laser,diffractive optical element micro optical system,etc.The features,applications,key technologies,status and developing trend of this laser imaging technology are presented.