Simulated artificial rainfall experiment and field verification experiment were carried out and power functionmodel was used to study the relationship between trace element loss and rainfall in rocky slope revegetation system.Results from simulated artificial rainfall experiment indicated that the growing rates of Fe,Mn and Cu losses in runoffwere high at the very beginning and however,they tended to decrease and be stable with artificial rainfall continuing.The growing rate of Zn loss in runoff was stable throughout the experiment.Power function model could be used tofit the changing process of trace element loss in runoff and the correlation coefficients were more than 0.90.Resultsfrom field verification experiment indicated that the results of the model fitting agreed well with the experimentalresults,the relative errors were less than 15%,and the deterministic coefficients were more than 0.85.Therefore,these models could predict the relationship between the trace element loss in runoff and rainfall,providing a theoretical basis of nutrients design for the rocky slope revegetation and restoration project.