Research review on assessment methodology of ecological security

Ecological security assessment is an essential process for solving the ecological security issues. Having done some review on the research progress of ecological security assessment,we got the definition of ecological security. The paper introduces the index,the criteria,the method of assessment. It mainly discusses the assessment models,weighting method,assessment methods,the advantage and the disadvantage. It concluded the methods of ecological security assessment and its developmental trend in terms of the model,the index,dynamic evaluation and so on.