The data in the manuscript titled "Unneglected impacts of cropland gain and loss on spring phenology".

The data mainly consist of two aspects. The first is to separately calculate the changes in the start of the growing season (SOS) and the cropland gain/loss from 2000 to 2019, and the results include the spatial distribution of the changes and the histogram of the frequency distribution; the second is to calculate the relative contributions of cropland changes (gain/loss) and climate change to the changes in SOS, and the results include the spatial distribution of the relative contributions and the histogram of the frequency distribution.