Abstract: Based on research documents of both at home and abroad relating to the relations of the raw cotton quality with the yarn spun,domestic and overseas scholars have set forth various prediction models in respect to raw cottons of different quality.In particular,more studies have been devoted to the yarn spinning strength models.Recently,new indexes of spinning yarn quality have been suggested,for example,Spinning Consistence Index and Integrated Cotton Index.However,not much research on other indexes of spinning yarn quality such as limit count,slubs,and neps were conducted,especially in China.The present work has evaluated the existing models and suggested the research orientation in the future.