In order to study the water network construction influences on the water resources system resilience evolution in the Fenhe River Basin, and in consideration of the continuous evolution of the water resources system resilience in the systemic, spatial, and temporal dimensions, as well as the sensitive dependence of the water resources system resilience on initial conditions and the nonlinearity and unpredictability of the resilience that conform to the main characteristics of the chaos theory, a water resources system resilience evaluation model was developed based on the chaos theory. The spatiotemporal evolution characteristics of the water resources system resilience in the Fenhe River Basin from 2017 to 2021 were studied. With 2020 and 2035 taken as the base year and level year, respectively, the resilience level of the water resources system in the Fenhe River Basin with and without water network in 2035 was explored. The results show that the resilience level of the water resources system in the Fenhe River Basin fluctuated little from 2017 to 2020, showing an overall upward trend, with the water resources system resilience in the west and the north being higher than that in the east and the south, and the resilience level of the water resources system decreased in 2021. Compared with the base year, the resilience level of the water resources system in the Fenhe River Basin and different sub-regions will decrease to different degrees in 2035 without water network. In the case of a water network, the resilience level of the water resources system in the river basin in 2035 will be greatly improved, and the low resilience level will be eliminated in all sub-regions. Therefore, the construction of the water network will significantly improve the water resources system resilience in the river basin.Keywords: water resources system resilience; water network construction; chaos theory; complex networks; the Fenhe River Basin 〖FL