Abstract: A new kind of organic soil stabilizer patent products—STW ecotypic soil stabilizer series which is self-developed by authors' group, is presented in this paper. The basic principle, basic formula, basic property and stability performance of STW soil stabilizer are investigated, and the water-stability,anti-erosion ability and vegetation growth of clay stabilized by STW type stabilizers is tested. The experimental results indicate that the STW soil stabilizer can improve the water-stability and anti-erosion, has a good effect on the slope protection, soil anti-erosion, slope stability and vegetation growth. These results also show its mighty future of application.