Abstract: The satellite laser ranging serves as a multitudinous discipline technical method achievement to study the Earth dynamics, the atmospheric dynamics, the geophysics and so on. This paper is based on the satellite laser ranging, and probe the satellite that does not have the retrodirective reflector. It is from the theory and experimentation mostly, and predict that how much the laser projection energy power can detect how for the distance ranges of the satellite, which also relate to the laser light beam parameter. The paper is based on the tradition laser ranging obtaining, and put forward the method from the theory to the experimental technique, which the actual diffuse reflection predict the laser ranging.