Abstract: With the development of industrialization and urbanization,the pollution of rivers and lakes is becoming increasingly serious. Reasonable evaluation of the ecological health of rivers and lakes is the basic premise for the restoration of rivers and lakes. Therefore,a study of evaluation system of river and lake ecological health for Tianmen Han Diversion Irrigation District has been carried out,by taking Hanbei River and Bantou Lake as examples. Firstly,the evaluation index system of river and lake ecological health is established,which is composed of 22 indices from five aspects:physical morphology structure,hydrological characteristics,water quality,aquatic organisms and benthos. The classification standard of each index is determined according to five grades:health,near health,sub-health,slightly morbid and morbid. Finally,the evaluation model is established by using analytic hierarchy process and entropy weight method to evaluate the ecological health of the typical river and lake in the Han Diversion Irrigation District. The results show that the water quality,hydrological characteristics,aquatic organisms and benthos of Hanbei River are at the “near healthy” level,and the overall ecological health is good,except that the physical structure of the river is “sub-healthy”. The indicators of Bantou Lake are basically “slightly morbid” or “sub-healthy”,and the overall ecological health is poor. The evaluation results objectively reflect the actual water ecological status of Hanbei River and Bantou Lake in the Han Diversion Irrigation District,and provide a scientific basis for the environmental management and ecological restoration of rivers and lakes in the irrigation area.