In order to research the impact of rainfall patterns on slope erosion in the rocky mountain area of North China,the loess cinnamon and the calcic cinnamon from this area were selected and indoor experiments were conducted. The experiment treatment included three patterns of simulated rainfalls with the same total rainfall and mean intensity,covering uniform type (60 mm/h),rising type (30~60~90 mm/h),and falling type (90~60~30 mm/h). The results indicated that: (1) The initial runoff generation time of different rainfall and patterns was negatively correlated with the rainfall intensity at the initial stage. The initial runoff generation time of the rising type slope was 1.98 and 4.15 times higher than that of the uniform and falling types,respectively. The order of total runoff and total erosion generated by different rainfall patterns was falling type > rising type > uniform type. The total runoff of the falling type was 1.05~1.12 times of other rainfall patterns,and the total erosion was 1.22 and 1.78 times of the rising and uniform types,respectively. (2) Under different rainfall patterns,the same rainfall intensity appeared in different rainfall stages,which made the processes of runoff and sediment production on the slope different. (3) The runoff and contribution rate of the same rainfall intensity at the initial stage of the rainfall pattern was smaller than that at the end stage. When the 30 mm/h rainfall intensity appeared at the beginning of the rainfall pattern,the erosion amount and contribution rate of the loess cinnamon was greater than that at the end stage,while the calcic cinnamon was the opposite.