The main purpose of urban ventilation corridor is to relieve urban heat island，increase air circulation，and protect the land which can improve the urban climate and environment. The observation and simulation of typical regions show that the ventilation corridors have some extent impact on microclimate，which can relieve local heat island intensity and increase local wind speed. But when the wind is static or nearly static，the increase rate is less significant. In the background of climate change and urbanization in recent years，the regional fog-haze weather is very frequent in China，but it is noteworthy that the urban ventilation corridor can’t change the large-scale air hang and other unfavorable meteorological diffusion conditions. The most effective mean of pollution treatmentis controlling pollutants emission，while the reasonable ventilation corridor planning and construction can be used as an assistant measure for long-term improving of urban ecological environment.