Abstract: Based on the rainfall-induced landslides forecast model with probability fitting curve in Guizhou Province, using the precipitation forecast data and observation data of 27 rainfall-induced landslides under the background of heavy precipitation in 2020, the operational practicability of the model was tested. The results show that the accuracy rate of rainfall-induced landslides forecast model of 3d in advance and 1d in advance are 63%, which is better than that of 2d in advance. The accuracy rate shows that with the forecast precipitation data, the rainfall-induced landslides forecast model has certain operational practicability. The actual location of the landslide is in good agreement with the region that is more likely to occur in the model early warning and prediction. It reconfirms the operational practicability of the rainfall-induced landslides forecast model. The precipitation intensity and falling area are particularly important factors affecting the accuracy of early warning and prediction of the rainfall-induced landslides.