Laser ranging technology is the method with the highest accuracy in the space target orbit measurement,which is conducive to the realization of high-precision measurement and monitoring of space target,as well as the improvement of the precision of target orbit forecast and the motorized circumvent ability of spacecraft.In this paper,the research progress of the diffuse laser ranging technique in the domestic and overseas,the laser burning project of the space debris and two receiving telescopes are introduced.The development trend of key technologies such as laser power improving,high repetition rate ranging,daytime ranging and array detector developing,as well as the application prospect in the field of debris removal are put forward.