At present, with the development of urban renewal, the transformation of infrastructure in the old urban area has become the main content of urban construction in this period. The contradiction between the people"s growing need for a better life and the lack of humanization, security and green of the current road is becoming increasingly prominent. Therefore, only through the fine transformation of the current road network nodes can we fully tap the traffic potential of urban roads, improve the functions of urban road network, and truly realize a safe, civilized, orderly and green traffic environment.