Changchun City is a very typical winter city. The frequent occurrence of haze in winter and the terrible outdoor thermal comfort have seriously affected residents’ outdoor activity and health. Unlike the non-cold city wind environment, non-cold city mainly aims to enhance the urban ventilation effect, so as to reduce the smog phenomenon and solve the urban heat island problem. The city needs the wind to weaken the haze, but the wind weakens the outdoor thermal comfort and destroys the activities in winter time. The paper tries to optimize urban wind environment from multi-scale to deal with that contradiction. Under this background, combined with the special topic of “Changchun General Urban Design”, the wind environment of Changchun is studied. Through the identification and analysis of urban wind environment problems, the disaster environment of various wind environment problems and their related influencing factors, the urban space form elements affecting urban wind environment, such as open space distribution, urban height distribution, architectural layout and architectural form are identified. After that, the subjective and objective evaluation method combined with CFD simulation method and network semantic analysis method and literature review method are used to analyze the countermeasures to form the coping strategy of “central urban scale-pedestrian scale”. The central urban scale couples the ventilation corridor with the natural landscape pattern to optimize the construction of the ventilation corridor. At present, there are a large number of parks scattered in the central urban area, which are not connected with the city, making it difficult for fresh air to flow into the city. However, by comparing the historical water system with the layout of urban parks, it is found that the restoration of Changchun historical water system can effectively connect urban parks in series so as to enhance urban ventilation. In this study, CFD simulation is used to compare the changes of regional wind environment before and after the restoration of historical water system, and it can be concluded that the regional wind speed can increase from 0.5m/s to 1m/s after the restoration of historical water system. In terms of urban form, due to the high-intensity development and construction in the southeast of Changchun over the past few years. The emergence of a large number of high-rise buildings hinders the ventilation of the city, making it difficult for the fresh cold air produced by the Great Black Mountains to flow into the city. Therefore, in order to introduce the fresh cold air produced by the Dahei Mountains in the southeast of the city into the city, the development intensity of construction land in the southeast of the city is limited (such as ventilation corridor width, building height and building density, etc.) to form a ventilation corridor, and combined with CFD simulation to analyze the changes of regional wind environment before and after the construction of ventilation corridor. Finally, it is concluded that after the construction of the ventilation corridor, the regional average wind speed increases by about 0.5m/s, which can more effectively introduce fresh cold air into the city, and thus improving the air quality inside the city. In the aspect of pedestrian scale, it mainly focuses on solving the problem of thermal comfort. This paper simulates and analyzes the influence mechanism of urban spatial elements on wind environment under different urban conditions, and evaluates the subjective will of citizens combined with network semantic analysis. Form the subjective and objective way of network semantic analysis and CFD simulation analysis, the paper more accurately puts forward the strategy of improving the thermal comfort on the pedestrian scale, such as reducing the layout of high-rise buildings, increasing the layout of podium and low-rise buildings, and increasing sunken squares and closed corridors. Finally, the layout of “coordinating the urban park water system at the macro central urban scale” is formed. Limiting the development intensity of the urban piedmont area, controlling the urban form and achieving the purpose of enhancing urban ventilation could alleviate the urban haze phenomenon. In the micro-pedestrian scale, improving thermal comfort by the combination of architectural form, architectural layout and urban design strategies, and the formation of different perspectives to deal with cold areas of the wind environment improvement strategy can improve the urban wind environment and enhance the vitality of the city.