Abstract: Based on the SBM-DEA and Malmquist models, the tourism efficiency and Malmquist productivity index of International Cultural Tourism Demonstration Area in Southern Anhui Province in 2009—2018 were measured, and with the ArcGIS analysis platform, the temporal-spatial evolution characteristics of urban tourism development efficiency were studied. The study found that in the time dimension, the annual average of tourism efficiency fluctuated, and the gap between cities was small and shrinking; most cities had the problem of "high input and low output". From the perspective of Malmquist after decomposition, technological progress has a certain effect on the improvement of total factor productivity. In the spatial dimension, tourism efficiency presents the inner circle structure with "Chizhou-Huangshan" as the core, and the central city has a certain space "spill effect"; the tourism efficiency and the center of gravity of the Malmquist index are alternately "east-west" . Based on this, suggestions for optimizing the efficiency of tourism resource allocation are put forward, providing reference for the continuous and intensive development of International Cultural Tourism Demonstration Area in Southern Anhui Province.

Key words: tourism development efficiency, SBM-DEA model, Malmquist index, temporal-spatial evolution