Soil nailing is a technique of insitu ground reinforcement that is bonded to surrounding ground to form combined unit. Its effect is similar to a gravity retaining wall. According to test results combined with engineering cases and monitoring, the principle of soil nailing wall, the calculation of its stability, the choice of its design parameter and installation are illustrated. The structure system may be used for supporting a temporary deep foundation pit and stabilizing a permanent slope. Monitoring of tlie soil nailing wall have showed that as a supporting system, the performence of the technique is reliable, economical and fastish. The author believes this technique will have a wide landscape of development in the future.