Abstract: Having the self-loading and unloading capability on the military vehicle can improve greatly the maneuverability. However the hydraulic drive system and the control system have important influence on the performance of the self-loading and unloading vehicle. This paper makes a presentation to the total-structure and performance of the vehicle at first, and then makes an qualitative analysis of the mechanism motion and load status of the vehicle, an effective analysis has been made about the design project of the hydraulic system and some opinions are put forward finally.