Abstract: ObjectiveContribution rate of agricultural mechanization to income increase of farmers was studied by quantitative analysis to provides scientific basis for the development and decision making of agricultural mechanization.MethodEleven indexes affecting income increase of farmers in Anhui during 2005-2015 were summed up,and the time series data corresponding to the indexes were obtained from yearbooks.Then the direct contribution rate and comprehen-sive contribution rate of agriculture mechanization to income increase of farmers were calculated respectively based on with/without method and Cobb-Douglas production function method.In addition,factor analysis and stepwise regression method were applied,and SPSS 22.0 and Eviews 8.0 software were used to analyze the time series data that affecting in-come increase of farmers in Anhui during 2005-2015 to determine the final production function model.ResultThe direct contribution rate of agricultural mechanization to rural per capita net income was stable at around 9.50%,and the highest one reached 10.25%.The comprehensive contribution rates during 2010-2015 and 2006-2015 were 25.22% and 29.40% re-spectively,which proved that agricultural mechanization had significant positive effects on income increase of farmers.SuggestionThe following suggestions are proposed to further promote the income increase of farmers:giving full play to the guiding role of purchase subsidy policy,establishing a new agricultural machinery maintenance system and strengthening the trainings for new professional farmers.