Abstract: Precision ultra-thin strip has excellent precision, corrosion resistance, surface finish, and other properties. With the rapid development of micro-manufacturing, micro-electronics and other high technology fields, the comprehensive performance of precision ultra-thin strip has been put forward more stringent requirements, but there are still problems in the rolling production of the ultra-thin strip, such as low yield, large residual stress, local bubble wave and so on. In order to further promote the in-depth research on the production of ultra-thin strip and promote the development of ultra-thin strip rolling theory, the research progress and existing problems of the rolling force theory, the minimum rolling thickness theory, the plastic deformation theory of ultra-thin strip and the elastic deformation theory of roll system are mainly summarized. Based on the above analysis, it is found that the traditional theory of the minimum rolling thickness has obvious limitations, which results in a large error between theoretical analysis results and experimental results; phenomenon of the work roll edge contact often occurs in the ultra-thin strip rolling process, but the conventional flattening calculation theory has a large calculation error at the end of the roll. In view of the above problems, a new formula for the conditional limiting producible thickness considering the restriction of the rolling force and a plate profile control model considering the work roll edge contact is derived. However, the ultra-thin strip with some special scientific problems in the process of rolling cannot be explained by traditional theory. Therefore, the future research trend of ultra-thin strip rolling is prospected, which is to analyze the deformation mechanism and microstructure characteristics from micro/mesoscopic scale

Key words: precision ultra-thin strip, rolling force model, the limiting producible thickness theory, roll elastic deformation theory, micro/mesoscopic scale