A Color Discerning Device(CDD) is the equipment to use in a Rice Processing Complex(RPC). A CDD can sorting
discolored grain according to light and shade. The existing a CDD`s driving performance is not so good as overseas
machine. Besides, transportation process causes a defect in the mechanism from impact or harmonic excitation or
etc. This study is represented the problem of CDD through experiment and simulation on a CDD. To analysis the
problem of driving condition, devide each part of CDD for performed modal analysis. The problem of driving of
driving condition and transportation process solved by carry out modal analysis and static analysis.