Abstract: Based on the data observed from 1961 to 1990(some data to 1994),this paper statistically analyzes the effect of ENSO on at mospheric pressure,total cloud cover,precipitation and numbers of tropical storm in Nansha waters,and discussed the comprehersive effect of ENSO on the climatic state in Nansha.The results show:(1) in the year when ENSO occurring,the atmospheric pressure in Nansha waters is all positive anomaly for many years accounting;(2) the total cloud cover anomaly in Nansha waters is basically identical with the variation trend of SOI in each ENSO duration;(3) the annual precipitation in Nansha waters is obviously little in the year when ENSO occurring(or next year);(4) the effect of ENSO on the annual numbers of tropic cyclone presents,there is fewer in the year when El Nino event occurring,more tropic cyclones next year and mainly occurring in autumn and winter.