Soil nailing reinforcing technique has been popular in western countries, because it has merits of rapid and economic construction. However, Taiwan began to employ this technique to stabilize slopes and excavations only until ten years ago. Though it has been thirty years after the development of soil nailing technique since 1970s, the method still has some area under active research such as mechanism, design method, etc. This article compares the differences in the reinforcing principles among similar reinforcement methods at first. Then, the reinforcing characteristics, designing methods as well as monitoring program are also introduced extensively.