Abstract: In order to determine quantitatively how much effect agriculture mechanization had on the agriculture output growth, the contributive rate of mechanization in agriculture was calculated. In practice the calculation is helpful to apprehend the agriculture mechanization developing level, potentialities and trend from overall. In theory the studies of contributive rate of single factor about industry system also have the academic significance. The paper presents the basic method for estimating agriculture mechanization contributive rate by applying a synthetic method of DEA(Data Envelopment Analysis) including two models of C²R and C²GS². This method overcomes the disadvantage of conventional DEA method in calculating contributive rate, by which the calculation result is bigger than the real ralue without considering technology progress contribution to agriculture growth. Therefore, taking technology progress contribution into account, the new result approaches to the real situation.