Abstract: Compositional data is a kind of complex qualitative data, especially its prediction research plays an important role in management science and economics. The technology of combination forecast is widely used in the forecast, which makes full use of the single forecast model and makes progress on the prediction accuracy. In this paper, the combination forecast method is applied to the prediction of compositional data analysis, based on some basic properties of the compositional data. We can see from the example that using the combination forecast can get a better prediction result.