Based on the daily rainfall dataset of 97 stations on the Southwest China for the period of 1960-2007, climatic variation of rainfall and rain day are investigated. The results show that total precipitation are excessive in East and few in west of the Southwest China, and summer rain day is excessive in the west and few in the east, but the opposite is existent in winter. It can be also found that total precipitation decreases in last 48 years. Additional, the spring and winter precipitation increase over the most regions. But in summer and autumn, the precipitation decreases. At the same time, the seasonal trends of rain day and precipitation are similar. The rain days of moderate rain and light rain have obvious decreasing trend. But, it has increasing trends for both rainstorm and heavy rain in last 48 years.