Abstract: It is very important for the ecological hydrological conservation and river adaptability management in arid inland river basins to determine and evaluate the factors affecting the river health and its change.The river section from Kaqung to Ayriktam of the Yarkant River was considered to be typical,the river health evaluation index system was set up with 23 indexes based on the pressure state response model,and the river health evaluation standards were put forward.On which the theory of coordinated development degree was introduced for assessing the river health,the river health evaluation model was established based on the coordinated development degree,the standard level of the coordinated development evaluation was established and divided,and the river health in 2015 was evaluated and analyzed.The results revealed that the coordinated development index along the river section D_total=0.495,the comprehensive evaluation index T_total=0.537,the type of coordinated development belonged to the “slightly uncoordinated type”,and the health status belonged to the “sub-health”level.These revealed that the health of the river was threatened.At the aspect of comprehensive river management in the future,the coordinated development level of stress-state-response factors should be improved,and the corresponding index level under restoration response factors should be dominant.

Key words: coordinated development degree, reachable best standard, PSR model, river health, Yarkant River