Abstract: This article focuses on the important role of load-sensitive electro-hydraulic lifting systems for heavy-duty tractors in the agricultural sector.Firstly, the principle and function of load-sensitive electro-hydraulic proportional valve and electro-hydraulic lifting system are elaborated in detail, and then the research status at home and abroad is analyzed from the aspects of electro-hydraulic proportional technology, cartridge valve technology and control technology.Then, the main developments and recent research results in this field are summarized, and the existing problems are pointed out.Finally, the focus and development direction of future research on load-sensitive systems for heavy-duty tractors are proposed, which will help scholars to better understand this field and Promote technological progress in the industry.