Abstract:The urban heat island effect is an important issue in the study of global warming. In order to explore the urban heat island effect in the urban area of Hangzhou, based on the Landsat data and the radiative transfer equation method, the surface temperature of the main urban area of Hangzhou was inverted, and the intensity of the heat island was graded by the mean-standard deviation method. 2008, 2013 and 2019 were analyzed. The temporal and spatial changes of land surface temperature and heat island effect in three years, and the correlation between land surface temperature and normalized difference vegetation index (NDVI) were studied. The results show that: the surface temperature has a certain spatial distribution law, and the surface temperature is significantly higher in the area close to the Qiantang River; the heat island distribution also has a certain temporal and spatial regularity, and the heat islands on both sides of the Qiantang River are relatively widely distributed. There is an increasing trend; the surface temperature in the main urban area of Hangzhou has a negative correlation with the NDVI index, and there is obvious spatial heterogeneity.