Evaluating the efficiency of environmental behavior of construction enterprises is an important means to promote the healthy and sustainable development of China's construction industry. According to the characteristics of the construction industry and the existing environmental credit standards of enterprises in China, the input-output index system of environmental behavior evaluation of construction enterprises is constructed. The improved DEA model is innovatively applied to the field of environmental behavior efficiency evaluation of enterprises, which solves the outstanding subjectivity of existing enterprise evaluation research, and obtains the evaluation and analysis method of construction enterprises. On this basis, the environmental behavior datas of representative construction enterprises from 2010 to 2017 is evaluated and analyzed. The results show that the overall efficiency of environmental behavior is good, but in view of the fluctuation of efficiency in odd and even years, it is still necessary to improve the efficiency of environmental behavior.