Objective　To establish the ecological health evaluation indicator system of college English classroom. Methods　The ecological health evaluation indicator system of college English classroom was formed through the combination of literature study and teaching practice

and a questionnaire was developed from it after several revisions. The improved Delphi method was conducted twice among the chosen experts. The evaluation indicators were chosen and revised according to the results of the consultations. SPSS 20.0 was used for statistical analysis. Results　The enthusiasm coefficients of experts in the two rounds' consultations were 83% and 100% respectively; their authority coefficients were 0.79 and 0.82 respectively; the coordination coefficients Kendall's W of experts' opinions of the importance of the indicators were 0.255 and 0.203 respectively (P < 0.05). The revised indicator system included 5 first-class

17 second-class and 48 third-class indicators. Conclusion　The ecological health evaluation indicator system of college English classroom established by this research is relatively scientific and valid

which may provide a method for College English teachers to diagnose the health state of their College English classroom ecology.