[ Objective ] The aim was to evaluate ecological environmental safety of four kinds of pesticides used in cucumber. [ Method ] A gas chromatographic method for the simultaneous analysis and detection of Fenoxanil, Hexaconazole, Spirodiclofen and Difenoconazole in cucum- ber was established. [Result] In the range of O. 02- 1. O0 mg/L, detection of Fenoxanil, Hexaconazole, Spirodiclofen and Difenoconazole chromatographic peak area and concentration showed a good linear relationship. In addition levels of O. 05, O. 50 and 1.00 mg/kg, the recov- eries were between 71.1% and 106.5% , and the relati...