Abstract: Using the inter-annual variation index，the market growth rate， the geographic concentration index，the variation coefficient and the tourism preference index to analysis the spatial and temporal distribution characteristics as well as the influence factors of China's outbound tourism in the past 10 years. Inter-annual variability index analysis showed that the inter-annual variation of China's outbound passenger flows to South Korea，Thailand，Kampuchea，the United States and Indonesia are large. Growth rate analysis shows that China's outbound tourism as a whole is in the fluctuant growth trend，and China's outbound countries can be classified as four categories as stable growth，rapid growth， fluctuation and recession type according to the country's growth rate of the diachronic changes, among them, Indonesia and South Korea are in the top two while Malaysia and Mongolia are in the last two in terms of the average growth rate. Geographic concentration index and variation coefficient analysis showed that China's outbound tourism spatial distribution experienced a "high dispersion characteristics" and gradually tended to be diversified. Tourism preference index analysis shows that China's outbound tourists prefer Hong Kong, Macao and overseas tourists prefer Singapore, Malaysia, Thailand, Japan, South Korea and the United States (among them, Thailand, Singapore and Japan ranked the top three); further analysis showed that the diffusion path of the outbound tourism to the East Asia, North America (especially the South Korea and the United States) is obvious, but the overall outbound tourism is still in short-range travel. Factors analysis showed that the economic, cultural, distance, economic and trade exchanges, outbound tourism policy, paid holidays ,major events, the exchange rate changes and the Sino foreign relations are the important factors affecting the spatial and temporal distribution of China's outbound tourism in the past 10 years.