Abstract:Taking Shanghai Golden City Road Pedestrian Street as the research object, three typical landscape spaces had been divided according to the degree of shade. In order to understand the dynamic nature of thermal comfort at urban street in Shanghai. The microclimate fixed-point measurement were carried out for the 12 measurement points under these space types in summer. At the same time, thermal comfort questionnaire and calculation of thermal comfort evaluation indicator for each measuring point space were carried out along the walking route. It is indicated that: ① Thermal factors are the main microclimate factors affecting the Physiological Equivalent Temperature (physiologically equivalent temperature, PET) evaluation results .According to the thermal comfort questionnaire, the main microclimate factors affecting street thermal comfort are air temperature and relative humidity. ② Microclimate significant changes according to the changes of landscape space in micro-scale. ③ Spatial variation of subjective thermal sensation influenced by the variation of microclimate. Short-term thermal experience (3~5mins) can influence the thermal sensation along the walking route. ④ Even though the overall thermal sensation is higher than neutral, a relative, dynamic thermal comfort can obtained through involuntary comparison with the previous thermal sensation along the spatial variation. ⑤ The thermal comfort temperature range calculated by PET was 21.1~41.1℃.It is verified that the dynamic thermal comfort is characterized by the results of on-site thermal comfort voting, which is affected by the microclimate space changes, physiological and psychological adaptation, and perceptual control. This research will provide experience and reference based on dynamic thermal comfort for guiding urban health design.