In order to describe the seepage pressure regular pattern of high slope affected by rainfall, and get to know its safety state, integral rainfall factor was presented into these analysis. The monitoring model frame based on Radial basis function (RBF) artificial neural network was constructed considering the integral rainfall factor. RBF centers were confirmed by the fuzzy cmeans algorithm (FCM) with the observed data. Application shows that the integral rainfall factor can effectively reflect the rainfall effect, and the monitoring model achieve good training and forecasting results.