中文摘要：

玉米作为我国第三大种植作物，其机械化收获技术有较大发展，特别是在一些关键技术上取得了突破性进展，预计今后几年玉米机械化收获规模和技术水平会有进一步的发展。发展玉米机械化收获技术需要工艺与农艺的相结合，需要致力于作业性能的不断改善，因地制宜地发展玉米收获机械。

英文摘要：

As the third planting crop, corn＇s mechanical harvesting has been referred to the order of the day. Yesterdayness, the corn harvest machine has an obvious progress, especially has been put a breakthrough in some key-problem. Intending, the scale and level would be come forth progress latter years. For developing the mechanization of corn harvesting technique, it is needed that leading of correct policy, guiding of feasible technique and agriculture, cooperating between colleges and academies and industries, paying attention to solution of the realistic problems and applying oneself to improve the working performances continuously, making foreign things serve China, adjusting measures to local conditions, developing the corn harvest machines advancing gradually in due order. In this paper the concept of mechanical harvesting rate based on the acreages of mechanical seeding ＆ mechanical transplant rice seedlings is mentioned.