In order to explore the effect of different heating rates on the DSC curve changes and activation energy calculations, DSC measurements were performed on two coal samples at different heating rates, and the results of the studies were studied. The change of the DSC curve under different heating rates and the influence of the heating rate selection on the calculation of the activation energy were analyzed. It was found that as the heating rate became larger, the peak of the DSC curve gradually increased, the width of the peak gradually increased, and the DSC curve changed from gentle The gradual decline gradually becomes vertical. When using the Arrhenius formula to calculate the activation energy, the selected heating rate has a large span and a large number, and the deviation between the calculated activation energy and the actual activation energy becomes smaller. Selecting a suitable heating rate can reduce the error in the calculation of the activation energy.