The production efficiency of Guangxi’s planting industry from 2011 to 2016 was measured on the basis of the three-phase DEA model to analyze the redundancy status of production factors and the optimization space in Guangxi planting industry of 2016. The results show: Environmental factors and statistical noise have a significant impact on crop production efficiency, without which, the production efficiency of Guangxi’s planting industry decreased from 2011 to 2016, and the main factor for the loss of production efficiency changed from the inefficiency of pure technical efficiency to scale efficiency. The degree of redundancy of crop production factors varies in different regions of Guangxi, which needs to be optimized according to the actual situation of the region. The local community should develop moderately scaled operations and increase the productivity of planting industry; improve the funding efficiency of financial support for agriculture and change farmers’ extensive management concept; and differentially regulate and control different regions based on the disparity in the redundancy of production factors.