Cell image enhancement is an essential step in cytopathological analysis and is the basic of other cell image processing such as image segementation,image fusion,etc.Traditional image enhancement techniques such as Gaussion filtering have good smoothing effects and have been widely used in most cases.But traditional filterings get smoothing effects at the cost of sacraficing object details in the image,and they are often to create hollows at the edge of the objects.Bilateral filtering method is developed quickly these years.It can obtain smoothing effects and keep object details at the same time.Compared with traditional filters,bilateral filters have better results.In this article,bilatral filtering algorithm is introduced to cell image processing according the unique stuctures of cell and get good enhancement result.