The socialized service system of agricultural machinery is an important channel to connect small farmers with modern agriculture, it is necessary to clarify the logical relationship between the socialized service of agricultural machinery and agricultural production efficiency, so as to provide an empirical basis for the construction of an efficient socialized service system of agricultural machinery. This article uses three-stage DEA model to calculate the production efficiency of corn growers by removing away external environmental variables and random noise effects, and uses the Tobit model to analyze the impact of the level of the utilization level of agricultural machinery socialized services and stable agricultural machinery rental channels on the production efficiency of corn growers. The results show that compared with the efficiency evaluation results of the first stages and third stages of the three-stage DEA model, it can be found that the pure technical efficiency of farmers has increased from 0.689 to 0.958, while the comprehensive efficiency and scale efficiency have decreased from 0.505 and 0.720 to 0.440 and 0.462, respectively, indicating that removing external environmental variables and random noise is helpful to obtain more realistic production efficiency of corn growers. The utilization level of socialized service of agricultural machinery has a significant positive impact on the production efficiency of corn growers. The stable agricultural machinery rental channels could improve the efficiency of corn production. Therefore, this article thinks that it should further deepen the degree of integration between socialized service of agricultural machinery and agricultural production, build a stable rental channel of socialized service of agricultural machinery, and fully leverage the role of the socialized service system of agricultural machinery in promoting the production efficiency of farmers.

农机社会化服务体系是小农户与现代农业连接的重要渠道，有必要厘清农机社会化服务与农业生产效率之间的逻辑关系，进而为构建高效的农机社会化服务体系提供实证依据。利用三阶段DEA模型，在剥离外部环境变量和随机噪声影响的基础上，对玉米种植户的生产效率进行测算；并采用Tobit模型，考察农机社会化服务利用水平与农机租用渠道对玉米种植户生产效率的影响。结果表明：对比三阶段DEA模型第一阶段与第三阶段的效率评价结果可发现，农户的纯技术效率由0.689提高至0.958，而综合效率与规模效率分别从0.505与0.720降低到0.440与0.462，表明剔除外部环境变量与随机噪声，有助于获得更为真实的玉米种植户生产效率；农机社会化服务利用水平对玉米种植户生产效率具有显著正向影响；稳定的农机租用渠道有助于玉米生产效率的提高。据此，应进一步加深农机社会化服务与农业生产结合程度，构建稳定的农机社会化服务租用渠道，充分发挥好农机社会化服务体系对农户生产效率的促进作用。