Abstract: This paper deals with water cycle and identifies its remarkable changes in the Yellow River basin.The water cycle provides an essential foundation for scientific assessment and rational development of regional water resources.The changes of water cycle elements depend closely on climate variations and human activity impacts.Based on the careful investigations of the influences resulting from climate change and human activities,the author describes the water cycle changes in the Yellow River basin,and suggests in this paper that the adoptive measures should be employed to adopt climate change influence through deeper and better understanding of the relationship between water cycle and climate change trend and predict it.The human activity impacts could scientifically controlling water resources development by enhancing water management.All in all,the targets should maintain renewability of natural water resources system in the Yellow River basin.