Rain has been identified as a major factor causing phosphorus (P) and dissolved organic carbon (DOC) loss, particularly in agricultural landscape. More application of chemical fertilizer and unreasonable agricultural management intensified the loss. In addition, rain also made great contribution to water pollution, such as eutrophication which degraded the surface water quality and threatened the hydrosphere ecosystem. The aim of this study was to monitor the dynamics of carbon and phosphorus losses under different rainfall events in Yanting,Sichuan Province, China (105°27' E,31°16' N) from July to August in 2012, then to better understand the processes and mechanisms of the dissolve organic carbon (DOC) and P loss, and to evaluated the effect of environment on purple soil area as well. The results showed that the total discharge of all of the rainfall events was 20399.8 m³ and the transport load of carbon and P was 83.19 kg and 5.1 kg, respectively. The higher rainfall resulted in the bigger loss load. Furthermore, the DOC and total phosphorus (TP) output dynamics were significantly different among the three types of rainfall. For example, the pattern of DOC concentration in the runoff is not consistent with the discharge of runoff, which showed that the concentration went down with the time length of rainfall first, and then sharply up, after it achieved the peak value, it decreased gradually and then tended to remain at a level. The order of peak values of total phosphorus (TP) appeared in the runoff was 20^th Jul > 20^th Aug > 30^th Aug. The particular phosphorus (PP) transported by surface flow in all kinds of rainfall types was the main form of P during runoff, while phosphate phosphorus (PO₄^3--P) occupied the main position of dissolved total phosphorus (DTP). The transport load of PP under each rainfall event was 1167.491,1891.331,984.74 g while that of PO₄^3--P was 108.37,338.8,167.79 g,respectively. The export concentration of DOC and TP in runoff under different rainfall events was 3.37,4.77,6.97 mg/L and 0.11,0.43,0.74 mg/L, respectively. One of the targets to evaluate the effectiveness of P is C/P ratio. In general the lower C/P ratio will lead to the higher effectiveness of P. In each rainfall events the ratio was 192, 48 and 42.1, respectively, which indicated that the chance of water pollution caused by big and middle rainfall types was much higher. In conclusion, the effective control measures should be taken to reduce the loss of P and carbon in this pluvial region, and more attentions should be given to big and middle rainfall types.