In comparison between the tide bore of rivers and the tide of ocean, the occurrence  time and height of the river tide bore has the same feature as the ocean tide ； but the river tide bore is influenced more easily by astronomy, weather and other factors, so it has the instability that is different from the ocean tide ； the tide level of the tidal bore is the comprehensive result influenced by all kinds of factors. Since the BP neural network can approach any non-linear function, a short-term prediction model of the tidal height has been constructed. Some historical tidal data, as a training sample, are used to train the model, and others are used to predict the tidal data. Finally, the validity and the feature of the prediction model have been verified.