Dam safety monitoring is an important means to grasp the safe operation of dams and a scientific basis to guide dam safety management.However，the traditional monitoring model has some limitations in dealing with complex non-linear problems.Based on the statistical model，this paper introduces the BP neural network optimization algorithm，and establishes a hybrid model of the neural network and the statistical model.The calculation of an example shows that the accuracy of the model in simulating and predicting the monitoring data is obviously improved，which has the value of popularization.