Abstract: The combine is a serious non-linear system, and there are many uncertain parameters. Therefore the researches in the combine’s load control need a lot of tests. Because of many constraints in the field tests, the comprehensive tests are elusive. In order to address these problems, a hardware-in-loop simulation platform was designed in this paper. The platform was formed by the load feedback controller and the virtual plant based on 4LZ2.0 combine. A test conditions designer was also provided. The system can be an effective tool for test the load feedback controller in research. Finally, a load feedback controller was tested on the platform under various test conditions. The result shows that the platform is useful.