Abstract: The dynamic characteristics for water resources system of water receiving district in Henan province of the middle route project of south-to-north water transfer is analyzed in this article,the qualitative relationship between the dynamic characteristic indexes and water cycle in each subsystem is given,and the fractal characteristic,complex extent and evolution rules are revealed.The results show that there are obvious fractal structure and chaotic characters in the system,which is the non-liner and there is a strange attractor during evolution,and its opening extent and resistance capacity reduce gradually from the water cycle system of precipitation-surface water-groundwater-deep underground water,and it mees the normal rules of water resources system from the cycle of precipitation.surface water-groundwater.The results provide an important reference for finding chances and means to improve the behavior of the water resources system.