Abstract: Under the idea of green development, to improve the coordination between economic benefits and environmental pollution arising from the energy utilization is the key to realize the regional sustainable development. The panel data in Shaanxi from 2006 to 2015 was used, the temporal changes and spatial differences of energy eco-efficiency in cities were studied by the SBM-TOBIT model, after this, the factors affecting the energy eco-efficiency were discussed. The results showed that: Shaanxi energy eco-efficiency presented a“U”evolution trend, it had a downward trend from 2006 to 2009, and increased after 2010, and the difference in efficiency between cities decreased. Energy eco-efficiency of Xi’an, Yan’an and Hanzhong reached above 1.0, and the resource utilization was relatively high and effective, which reached the green state of development; while that of Ankang, Weinan and Shangluo was relatively low, less than 0.6, there was an over-investment in all factors and a low utilization rate of esources. The TOBIT model analysis of energy ecoefficiency in Shaanxi demonstrates that the degree of opening to the outside world and the improvement of economic development could promote the energy eco-efficiency, and the correlation is positive; the increase of energy consumption and government intervention could cause the decline of energy eco-efficiency in different degrees, and the correlation is negative. Key words: SBM model; energy eco