Abstract: Both minimum turning radius and maximum carrying capacity are important parameters for designing monorail vehicles. In this paper, the structure and different terrain dynamics of monorail vehicles on the flat ground and hillside were experimented and analyzed. The result showed that the relationship of the minimum turning radius, maximum carrying capacity was affected by the size of the vehicle structure, and the mathematical formula was found. A theoretical basis for designing monorail vehicles of mountain orchards and other similar transportation machines is provided in this pape