The CDAT dataset contains near-surface air temperature data for China during the period of 1979-2018, in Celsius, daily temporal (Tmax, Tmin, Tavg), and 0.1º spatial resolution. This product integrates multiple data sources such as reanalysis data (ERA5, CMFD), remote sensing data (MODIS), and in situ data, and is obtained by combining the temperature strategy to distinguish between clear sky and non-clear sky weather conditions. It is proved that this dataset has high accuracy and can be used in the further study of regional climate change.