For the problem of wetting collapsible loess foundation in loess area, and common methods used in dealing with collapsible loess foundation are insufficiency, new treatment technologies, including loess solidified by polymer and comprehensive method of dynamic compaction and chemical solidification, were proposed. Experimental studies on loess solidified by a series of SH were carried out. The results show that the loess solidified by SH has advantages of high strength, good water-resistance, and frost resisting, low-cost. Consequently, SH is feasible to deal with loess foundation. Because it fits in with the development trend for new combined technology in reinforcement of rock and soil, dynamic compaction and chemical solidification has some applying prospects. In order to establish this new method, things correlated with the study should be done.