Shape control is an important aspect of strip production. Current cold rolled strip strip crown precision basically meet user requirements. However, the level of control the production of cold-rolled strip edge drop in the prevalence of the phenomenon has been no breakthrough, unilateral trimming the amount of ordinary strip rolling hovering in 20 ~ 30mm, high-end products, unilateral cut variable as much as 50mm or more. This severely reduces the rate of finished strip, also increases the consumption of resources during the rolling process. So cold rolled strip edge drop has become an issue of common concern to all countries of the world in recent years, it is an important topic in the field of shape control. The following nonlinear finite element software MARC, developed elastoplastic finite element simulation system simulation of cold-rolled strip steel rolling process, rolling process research reduction rate, friction factor, strip entry thickness, width and other factors entrance influence of edge drop, for improving the mill control level, reducing edge drop is important to improve the finished product rate.