With the development of society, the contradiction between the increase of human demand for resources and the lack of resources is becoming more and more serious. In the face of severe water shortage in northern cities of China, rainwater collection and utilization is undoubtedly an effective strategy to alleviate the lack of water resources. In order to improve the use power of rainwater resources, based on the analysis of the concept of rainwater resources, this paper discusses the collection and utilization of rainwater resources. Practice shows that the collection and utilization of rainwater resources is a reasonable choice for urban rainwater use. Based on the current situation that can improve the collection and utilization of urban rainwater resources, this paper puts forward the necessity of collecting urban rainwater, and on this basis, analyzes the problems and lack of design and treatment skills, load assessment and other parameters of collecting urban rainwater, and puts forward the methods and suggestions of rainwater collection and application.