Based on previous studies, this paper studies the impact factor of inbound tourism demand in Sanya.In the premise of quantitative analysis of the main inbound tourist source countries in Sanya, the factors affecting the inbound tourism market in Sanya are determined.Using double logarithmic linear model to the time series data statistical analysis; confirm the factors affecting the demand for inbound tourism market in Sanya are per capita GNI, exchange rate, relative CPI, major events and unexpected events.Finally, based on the analysis of the factors affecting the inbound tourism demand in Sanya, this paper puts forward the strategy of developing the inbound tourism market in Sanya.