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Tobacco foreign material eliminating is an important step in the process of cigarette production. Through combing the research progress of tobacco foreign material eliminating technology in cigarette processing in China, it was pointed out that there were significant differences of tobacco foreign material in threshing and redrying, tobacco primary processing, rolling and wrapping process and waste cigarette treatment process. The tobacco foreign material eliminating methods in domestic cigarette processing included air purification removal, photoelectric impurity removal, laser impurity removal, etc. Different impurity removal methods had their advantages, disadvantages and applicable conditions. However, these impurity removal methods and technologies for tobacco were basically used alone, which made it difficult to meet the impurity removal efficiency while taking into account other index requirements. In the future, it should focus on in-depth research from three aspects: clarifying the characteristics and service conditions of various impurity removal methods, optimizing and upgrading the existing commonly used impurity removal methods, and carrying out research on multiple impurity removal and integrated composite impurity removal technologies. This would comprehensively improve the level of tobacco foreign material eliminating technology in the cigarette processing process, and then improve the cigarette product processing quality. [ABSTRACT FROM AUTHOR]