[Objective] Ecological water tank catchment and utilization system of road rainwater resources was demonstrated to give some guidances of the collection and recycling of road rainwater and of effectively improving the collection rainwater quality. This was also helpful for providing excellent water sources for greening plant growth. [Methods] The system's was used as water storage facilities, which can provide the basis for follow-up system of“free breathing”. The porosity of polypropylene plastic rainwater collection module was 90%~95%. And the impervious facilities laid stratified double geotextile and waterproof membrane. In which, 30 cm thickness filled-in soil can sufficiently ensure the dynamic equilibrium between catchment and supply of the rainwater resources. [Results] Ecological water tank system has the functions of dynamic equilibrium adjustment of water resourses catchment and supply, and sewage interception as well. It can efficiently collect high-quality rainwater on the road, and effectively control the pollution of soil and groundwater caused by rainwater. [Conclusion] This system can also provided the conditions and new approaches for efficient recycling of rainwater resources and provides a new way for efficient management and use of regional rainwater resources.