Abstract: Combined pollution of chlorinated solvent and phenolic compounds is very common in the groundwater. However, the absence of dissolved oxygen (DO) in the groundwater renders aerobic degradation difficult. Burkholderia cepacia was acclimated to tolerate high concentration of H2O2 and degrade trichloroethylene (TCE) and phenol using H2O2 as an oxygen source in the groundwater. The results showed that the optimal concentration of H2O2 was 4 mmol/L for the growth of Burkholderia cepacia. After adding H2O2, active biodegradation of TCE followed after a short lag phase, but it significantly improved the biodegradation rate of TCE. And the efficiency of TCE degradation reached up to 79.80%. The degradation curves of phenol and TCE were represented by the Monod and Haldane model respectively in the presence of H2O2, and there is a well relevance between each other. This study findings provided a scientific evidence for the aerobic degradation of TCE phenol co contaminated groundwater.