As a key soil erosion prevention reserve, the bare slope of the southern foothills of Dabie Mountain has serious soil erosion. In order to explore the response of runoff and sediment to rainfall on typical bare land slopes, the rainfall-runoff-sediment process of bare land runoff plots was monitored by automatic runoff and sediment monitoring equipment. Based on the annual erosive rainfall data in 2020, the rainfall patterns were divided according to the rainfall peak time series. The characteristics of cumulative runoff and sediment yield of the four rainfall patterns and the runoff and sediment characteristics of individual rainfall were analyzed, and the optimal function model was established. The results showed that: (1) The maximum 30 min rainfall intensity was an important factor affecting the sediment volume and runoff coefficient of rainfall events in the southern foot of Dabie Mountains. There was a positive correlation between the rainfall and sediment load in the first 48 hours of initial and middle concentrated rainfall events. (2) There were significant differences in the process of runoff and sediment yield under different rainfall patterns, but the difference of runoff and sediment indexes was not significant. The optimal model of cumulative runoff and sediment yield under different rainfall patterns was Logistic model. (3) Under different rainfall patterns, the variation trend and peak value occurrence rule of rainfall intensity, runoff rate and sediment yield rate were consistent, and the process of sediment yield lagged behind the process of rainfall intensity. The lag of sediment yield mostly occurred in the early stage of concentrated rainfall, and the lag of runoff mostly occurred in the middle and late stage of concentrated rainfall. The results can reveal the relationship between rainfall-runoff-sediment yield, which has certain scientific guiding significance for the prevention and control of soil and water loss on the slope in this area.