The laser stealth of space target is useful, important and urgent in practice. This paper introduces the definition expression of laser radar cross section (LRCS) and the general laws of the influencing factors of space target's LRCS, including surface materials types, target's shape and size. Then this paper discusses the possible laser stealth methods of space target in practical applications from the two view points of material stealth methods and shape stealth methods. These conclusions and suggestions can provide references for the next research thinking and methods of the target's laser stealth.