[Objective] The erodibility factors of different soil types were calculated in order to provide scientific basis for quantitative evaluation of soil erosion and dynamic monitoring of soil erosion.[Methods] By collecting data from runoff plots in the whole country and using the data selection criteria. The K factor value of the main kinds of soil in China was calculated by plot data and evaluated the applicability of the Wischmeier's and the EPIC model in the country.[Results] The K value of the main kinds of soil in China ranged from 0.000 8 to 0.070 5(t·hm²·h)/(hm²·MJ·mm). The K value of black soil, cultivated loessial soil and cinnamon soil were higher, while it was lower in the red earths and purple soil. In the whole country, there was a large deviation between the K factor values estimated by the models and the observed data, but the revised empirical model could be used properly in the black soil region of Northeast China.[Conclusion] The K value correcting to the unit runoff plot was calculated based on the data of the runoff plots and references throughout the country. The K value varied greatly over space, it showed that there had a decreasing tendency from the north to the south. In order to obtain a more accurate K value and establish relevant empirical formulas, it was necessary to further strengthen the monitoring points management and the accumulation of long-term observation data.