According to the data of temperature and precipitation in the West of Hainan Island from 1951 to 2000, the climatic change of the West of Hainan Island is analyzed .The results show that the temperature for the last 50 years appears to be going up(0.24℃/10a), especially during the period of 1990s. The warming trend in winter is more than that in other seasons. For this reason, the climate of the West of Hainan Island could be divided into 3 cold periods and 4 warm periods. Furthermore, the precipitation in the West of Hainan Island for the last 50 years appears to decrease (-23 93mm/10a), but the precipitation in spring, autumn and winter appears to increase.