Aiming at the problems of poor terrain adaptability and difficult control of stubble height of self-propelled green fodder harvester in complex environment, a header profiling system suitable for self-propelled green fodder harvester was designed by using two-point detection-electro-hydraulic control, and the relevant experimental research of profiling system was carried out. On the basis of explaining the overall architecture and specific working principle of the system, the structural parameters of the main key components such as the profiling detection mechanism and the lateral profiling adjustment mechanism were determined through theoretical calculation. The static stress analysis model was established to obtain the relevant mechanical characteristics of the connection between the header and the feeding box. ADAMS simulation software was used to create a cylinder load characteristic model, complete the design and related optimization of the profiling system, and determine the optimal operating parameter range of the cylinder. In order to verify the function of the profiling system, the system was mounted on the 4QZ-30 self-propelled green fodder harvester for testing, and the ratio of the time of the cutting knife front end from the ground height within 100~150mm to the total test time during the test process was used as the test index, the road simulation test and field profiling harvesting tests were arranged, and the control system was used to obtain the header height and response time in real time, and the results showed that the profiling detection mechanism detected the height information reliably. The linear fitting R2 value was 0.9987; the average value of the response time t of the profiling control system was within 0.16s; the profiling system can perform profiling work on the ground with a slope of 0°~6° at driving speed of 0~6km/h, and during the road simulation test, the ratio β of the time when the height of the cutting knife was within the standard range to the total test time was 90.76%, the pass rates of field profiling harvesting tests were 86.67%, 86.67% and 93.33%,which improved the terrain adaptability of the self-propelled green fodder harvester and reduced the difficulty of controlling the stubble height. It can provide a reference for the profiling technology of selfpropelled green fodder harvester.