This paper introduces the grey system theory and the forecasting method of GM(1,1) model in brief, then establishes the milk cow production forecasting model through the breeding stock data of milk cow of HeiLongJiang reclamation area from 2002 to 2005. The precision of model is accurate. So this method is applied to predict the production, it can reflect the change of milk cow production correctly. On the basis of analyses, author puts forward some proposes about development of milk cow.