Abstract: With the continuous improvement of the level of agricultural mechanization, wheat combine harvester plays an increasingly important role in agricultural production. This paper focuses on wheat combine harvester cleaning technology, introduces the working principle of wheat combine harvester and cleaning process, focuses on the role and significance of cleaning technology in wheat harvesting process, analyzes the current common cleaning device and its advantages and disadvantages, and discusses the application prospects of the cleaning device in improving the efficiency and quality of wheat harvesting. Finally, it looks forward to the future development trend of wheat combine harvester scavenging technology, and puts forward suggestions to further optimize and improve the scavenging device, so as to promote the wider application of wheat combine harvester and the realization of higher efficiency in modern agricultural production.