Abstract: The construction of ecological environment supporting zone has benn written in The Planning Outline of Collaborative Development of Beijing Tianjin Hebei. The main purpose is to improve environment quality of air and water resource to offer the environment support to the collaborative development of Beijing Tianjin Hebei areas. Based on the method of linear function transform of DEA, this paper treats environmetal pollutants as “bad” outcomes, so we can get environment efficiency values of each city for Hebei province by using a panel data from 2001 to 2013. Whereafter, the author uses the Tobit model to vestigate its determinants. The study shows, (1)the current environment guality can't adapt to the reguirement of the collaborative to development of Beijing Tianjin Hebei areas, especially Baoding,xingtai and Handan having low environment efficiency,and there are different degrees of low efficiency in resource investment. (2)Some factors may improve the value of environmental efficiency such as per capita income, industrial structure and technology. Meanwhile,the density of population decreased the value. (3)To control environmental pollution involves the mutual effort of Beijing Tianjin Hebei, and the key is to adjust the industrial stucture of Hebei province and energy structare of laying stress on coal to realize the collaborative development of Beijing Tianjin Hebei areas.

Key words: collaborative development of Beijing Tianjin Hebei, environment efficiency, DEA model, Tobit model