Simulated rainfall experiments were conducted with three slope gradients(11. 3°, 21. 8°, and 35. 0°)and three rainfall intensities(85 mm/h, 110 mm/h, and 125 mm/h)to investigate the rill evolution process on saline soil slopes in coastal reclamation. The evolution process of rill erosion was recorded with a digital camera, and then the image data were analyzed with Image-Pro Plus(IPP)6 software. The results are as follows: (a)Rills formed soon after the runoff occurred and the rill density changed rapidly with different slope gradients and rainfall intensities. The rill number, rill depth, average rill width, and rill density increased with the rainfall duration. (b)At low slope gradients the drop pits developed slowly, and the rill erosion rate was low. With the increase of the slope gradient, water concentrated in the drop pits rapidly, and the erosion rate increased, leading to rapid evolution of rills. (c)The number of rills increased with the rill depth. There were significant linear positive correlations of the slope erosion rate with the average depth of rills and Re at p< 0. 05 and p< 0. 01, respectively.