Trichloroethylene (TCE) has been the most prevalent contaminant in soil and groundwater due to its wide use in modern industrial production. However, its impact on human health has also been a growing concern. Four kinds of In-Situ remediation of TCE-contaminated soil and groundwater source area, including In-Situ Chemical Oxidation (ISCO), In-Situ Thermal Treatment (ISTR) and In-Situ Bioremediation, were summarized in detail based on the exrtensive review of the worldwide literatures. Other In-Situ remediation techniques were also discussed, such as Fenton Oxidation, Persulfate Oxidation, Steam Enhanced Extraction (SEE) and Electrical Resistance Heating (ERH).