By economics methods, this paper analyzed the three characteristics of tourism market in Sanya such as the limitation of supply capacity, the sharp seasonality of demands and the lower elasticity of demands; constructed the price inflation model and the price fixing model; and put forward that the relevant department in Sanya should enforce the transformation and promotion of tourism infrastructure and accommodation, and tourism development and cooperation with neighboring regions to improve tourism supply flexibility from supply aspect; lighten the impacts of the seasonal differentiation in demand and balance the contradictions between the supply and the demand in tourism from demand aspect to clear the problems of slaughtering guests in the spring festival in Sanya.