Abstract: My country’s corn planting area is wide, and the corn combine harvester is an important part of the whole mechanized production of corn. However, the current corn harvesting has a high degree of mechanization, but the degree of intelligence is low, and the investment in manpower is large. In response to the above problems, this research has intelligently controlled the basic structure of the harvester on the basis of the traditional corn harvester. Based on the transmission mode and working principle of each mechanism, the electric device and sensor of the corn harvester have been designed and selected. Combined with PLC control principle and sensor output signal processing, to control the electric device and the hydraulic components of the harvester’s walking hydraulic system to realize the intelligent control of the corn harvester. Taking the corn harvester operation as the basic condition,the feasibility test of the intelligent control system is carried out. The test results of the test system show that the response speed of each working part is faster, and the overshoot and steady-state error of each working part are small. The established control strategy can optimize various working parameters of the corn harvester no matter what the load condition. The test obtained 1. 676% and 1. 386% corn picking loss rate,which met the requirements of corn harvest. The research results provide theoretical basis and technical support for the research of corn combine harvester.