Abstract: A method of soil vibration cutting resistance reduction was proposed for deep-agricultural machinery chassis are easy to cause wheel-slippage when they work in hilly area. Aiming at the problems, an eight-wheel driven chassis adopting the principle of profiling terrain was designed with five degree of freedom. The structure parameters of the chassis was calculated and analyzed. The test of sample machine was carried out, and the results showed that the chassis had good adaptability to the terrain, good traffic ability and flexible steering ability. It can provide enough adhesion force and meet requirements for agricultural machinery working in rough hilly area.