This paper analyzes the request for the theories of Ergonomics and the idea of humanistic design in the design of large-scale roller tractor and the relations among person, machine and environment of its cab.

The analyses of influence factor of drag power on tyre tractor;

In this paper,the preparing method of the pre tray wood mould of tractor with 110 power was introduced.

An apparatus for measuring slip of wheeled tractor is developed,which is composed of a monolithic computer MCS-51 system and slip detecting components (rotary encoders).

Combination of the 3C certification of the tractor enterprise, analysis the noise limit value and noise level of domestic and foreign tractor, summarizes the noise control method and measures in commonly used small wheeled tractor.

Applied the ADAMS software to dynamic simulate the wheeled tractor suspension device, analysis its force at transportation course, find out the main force parameters of suspension device, then the corresponding optimal design was implemented, provides a theoret- ical basis for practical application and the key position of designing in suspension device.