To meet the parameter display requirement of a mine electric locomotive,a new LCD display system based on embedded μC / OS-II is designed. The hardware circuit including LCD circuit and CAN communication circuit is designed,and theμC / OS-II operating system is transplanted. And on this basis,the software design of this system is accomplished. By testing the LCD display system,it can display battery parameter accurately. The result shows that the design of the LCD display system based on μC / OS-II meets the requirement of the locomotive for parameter real time and accuracy.