Abstract: Abstract: To guide selection of the appropriate mechanical production mode within a certain area, the government and producers should make a choice according to production efficiency of the mode and to optimize its efficiency. The research sorted mechanization production mode, based on the degree of used agricultural machinery under a certain type of organizers in the production process (The organizers' type such as: individual farmer, family farm, agricultural production cooperatives for their own use machinery, agricultural machinery service cooperation, agricultural enterprise for their own use machinery, agricultural enterprise provide agricultural machinery operation service. The degree of used agricultural machinery is divided into 8 levels: less than 4 processes, with 4-7 processes, more than 7 processes, or fully mechanized are in 10 ones for field production, and on the basis of the above four types field production extended to postpartum processing)，and focused on efficiency of 24 typical modes with Paddy rice- wheat rotation planting in double crop production area in Jiangsu province. The primary data was collected from field investigated，and for respectively output targets to a money income for government or the grain yield for producers. The DEA-Tobit method was applied for analyzing the different patterns under different output object for production efficiency and the influence factors. The relationship between production mode and its efficiency was obtained. In addition, including to the relationship between the efficiency and a few influence factors with mechanized production were analyzed. Results of this study clearly provide to us, the efficiency is significant difference under each output targets. If we want to obtain high efficiency based on object for money income, it shows that efficiency is higher in mechanized production pattern of the characteristics，which is more high degree of using agricultural machinery operation in the production process, and which is cooperation organization or the agricultural enterprise with the agricultural machinery to do some operation service for the planting farmers. However, if we want to high efficiency focus on yield production，the members participate in mechanized production with local and for their own use agricultural machinery, and the patterns of mechanization operation is in large proportion. And the efficiency is related to the six factors, such as financial subsidy accounts for total investment，the cultivated area condition, educated labors are the great positive effected factors to efficiency of production patterns. The proportion of agricultural machinery and laborer, on average monetary value of machinery，and the planting area for each laborer are affected efficiency to the different production patterns with positive or negative. And most of the mechanization production modes are in the scale of diminishing returns at the present situation, that is affected to the investment option and management scale. Therefore, according to the different output targets, it should choose mode in higher degree of using mechanization production operation within a certain organizers, and for the efficiency adjust influence factors accordingly. The research results contribute to choose the suitable mechanization production mode, and provide reference ways to improve the efficiency for the producers and government.