[Objective] Runoff and sediment yield characteristics of different grass-planting slope protection in typical dikes of Poyang Lake were studied in order to provide a scientific basis for the selection of grass species and the guiding of dike slope protection.[Methods] Responses of soil and water loss characteristics to different rainfall intensities were studied using rainfall simulation under 5 dike slope types, which are bare land(BL), natural restoration slope(NRS), Cynodon dactylon sowing in drill slope(CDS), Zoysia sinca sowing in drill slope(ZSS), Eremochloa ophiuroides and-stem planting slope(EOS), in Jiuhe Dike of Yongxiu County, a typical dike of Poyang Lake.[Results] As compared with BL, other four slope protection models played positive effect in prolonging initial runoff times and reducing flow velocities, and there was the lowest flow velocity under EOS treatment. There were no significant difference of runoff coefficient between BL and other four slopes under 20 mm/h rainfall intensity, but with the increase of the rainfall intensity, the inhibition of vegetation protection to surface runoff were becoming more and more obvious. Sediment yields increased with the increase of rainfall intensity under 5 treatments.[Conclusion] Compared with BL, vegetation protection slopes could effectively reduce dike sediment loss, especially under high rainfall intensity.