When we use cotton filling machine to do filling operation, sometimes we may encounter the uneven cotton problem. Today we will check its reason and how to control the quality of filling cotton. If the cotton after be opened not been processed very well, there are some bumps are not separated, it will cause cotton uneven problem, because the filling machine doesn’t has the opening function, so first we should check whether all cotton have been opened very well, and observe in the filling cotton/fiber process, whether it is because of workers spending different time on filling cotton, so in some place, fiber were stucked. There is voltage instability also will affect the filling process and cotton filling quality, We also should consider it.