Abstract: s: After applying of fenpropathrin,phoxim and their mixture in soils, respectively, the residue of fenpropathrin and phoxim was analyzed by gas chromatography. The results showed that residue half time (T0.5) of fenpropathrin in soil were 17.4d and 18.6d. The residue half time (T0.5) of phoxim in soil were 14.8d and 14.6d. There were no remarkable differences between the use alone and the mixed use of fenpropathrin and phoxim. From the residue standpoint, the mixed use of the two insecticides in soil was safety.