Abstract: The 19 surface water samples were collected from the West Lake of Hangzhou in summer and winter. The concentrations of 18 organochlorine pesticides(OCPs) in the samples were determined by GC\|ECD with the internal standard method. The results showed that the total concentrations of OCPs in surface water from the West Lake of Hangzhou in both summer and winter were in the ranges of 2486-15980 ng·L-1（with a mean of 75.09 ng·L-1） and 20.88-96.24 ng·L-1 （with a mean of 43.60 ng·L-1）. The concentration of OCPs was seasonal and the level of OCPs in summer was higher than that in winter. The orders as the total concentrations of OCPs in surface water from the West Lake of Hangzhou were: DDTs>HCHs>other OCPs， and DDTs and HCHs were mainly the early residues in environment. Compared with other regions， the concentration of OCPs in surface water from the West Lake of Hangzhou was lower. The concentration of DDTs and HCHs in surface waters did not exceed the limit of surface water environment quality of China．

Key words: organochlorine pesticides, spatial and temporal distribution, surface water, West Lake of Hangzhou