Abstract: Corn is an important food crop and strategic materials in China. The improvement of corn production is particularly important for the development of our country. At the middle and later periods of maize growth, the topdressing can effectively increase the crop yield, reduce the use of base fertilizer, improve the utilization ration of fertilizer, and the phenomenon of soil harden, which increases the comprehensive benefit of corn production. At present, the corn topdressing work is still dominated by artificial fertilization and the topdressing efficiency is lower, which limits the rapid development of maize industry and also accelerates the demand of topdressing machinery in China. The mechanized fertilizer can liberate the workforce effectively, improve topdressing efficiency significantly, and reduce the waste of fertilizer. The research progress and application status of topdressing machinery was stated. And the fertilization structure and technical characteristic of corn topdressing machinery was analyzed and discussed at home and abroad. The problems and deficiencies existing in current domestic fertilization technology of corn topdressing machinery were summarized. Furthermore, some suggestions were proposed for the research and development of domestic maize fertilizer machinery.