To analyze the changes of water carrying capacity in Hanzhong City and to reflect the safety degree of water use in order to find ways and methods to improve the carrying capacity of waters. In this paper

the ecological carrying capacity of Hanzhong City is calculated and analyzed. From 2001 to 2013

the ecological carrying capacity of Hanzhong City is in a safe state

but the ecological carrying capacity index of the waters is larger and the safety degree is gradually reduced. Hantai area of ecological carrying capacity index is 0.56

in the basic safety state

the remaining counties ecological bearing capacity index of less than 0.50

is in safe condition. Among them

the Ningqiang

Lueyang

Zhenba

Liuba

Feping five counties of ecological carrying capacity index is less than 0.10; Yangxian

Xixiang

Mianxian three county of ecological carrying capacity index in 0.20～0.30

Nanzheng capacity index in 0.30～0.40

ChengGu index in 0.40～0.50. But a drop in ecological pressure increased

the ecological carrying capacity

safety degree gradually reduce the trend

suggest grassland

take next to fishery production planning

strengthen management of water ecological environment protection and strengthen the monitoring of water management measures to improve the water ecological carrying capacity.