When the contaminated soil is remedied by remediation agents through traditional injection well, the effects are poor with long treatment cycle. In this paper, high-pressure rotary jet grouting technology is used to make up for the deficiency of the traditional agents injection. Indoor soaking experiments are carried out to study and compare the corrosiveness of traditional agents to high-pressure rotary jet equipment; while using cement slurry as “agent” to carry out the field simulation test of high-pressure rotary jet, the high-pressure jet grouting parameters suitable for in-situ remediation of high viscosity formation in Shanghai are obtained and the jet grouting technology for in-situ remediation of contaminated sites is perfected.