Multiply transformation is correspondingly made for the original data series of MGM(1,??) model. Through
calculating a series of mathematical formula, the effect of multiple transformation on parameters characteristics of the
model is analyzed, and the changes of simulation and prediction values and the relative errors of the model after multiple
transformation are discussed. The study results show that the simulative and predicative effect of the model is not changed,
the magnitude of the data is also reduced and the calculating process is simplified, while the original data series are made the
same times of multiple transformation. The results have great significance for the further systematical study of MGM(1, ??)
model.