Abstract: Objective : To study the fatty liver of limitation of the location, shape, density and the differential diagnosis methods. Methods : 40 cases fatty liver of limitation were riddled and the plain and enhanced CT was performed. To diagnosis using CT number and the criteria of relative density of hepatic vessels and postcontrast display. Results : In 40 cases, 29 cases were distributed by the segment of liver(72.2%),10 cases were distributed by the leaf of liver (22.2%), 1 cases was spherical (2.2%). All of the cases were appearance of hepatic vessels immersion. 10 cases were appearance of reverse hepatic vessels. The density was risen of light and the vessels was clear. Conclusion : Using CT number, the criteria of relative density of hepatic vessels and the relative density is of great value in the diagnosis of the fatty liver of limitation.