Abstract. The sunflower oil that has rich nutritional value is high-quality nutrition oil. The quality of
oil products was impacted seriously by a lot of harmful substances that contained in sunflower seed
shell. The characteristic of sunflower seeds are the kernel is smaller and the shell density is large. The
shelling operation is quite difficult with the characteristic. The shelling devices for the sunflower
seeds based on optimization design method and dynamics analysis is introduced in the paper. The
shelling devices for the sunflower seeds can be used in the place of processing factory and individual
workshop. The structure of shelling devices was designed with the 3d modeling software. In the
research, the virtual prototype technology was used to simulate the kinematics and dynamics
characteristics of the mechanical system. The feasibility of the design scheme of mechanical system
was proved with the simulation analysis results. The equipment has advantages of the structure is
compact, safe and reliable, easy to use. The research of the shelling devices for sunflower seeds can
be regarded as the reference of the related research.