In order to improve the design quality of end face engagement cycloid steel ball planetary transmission

this paper focuses on the theories and virtue prototypes technique of cycloid steel ball planetary transmission. On the base of deducing meshing theory

by simplifying the parameters and using computer software

the virtue digital prototype of cycloid steel ball planetary transmission is realized. The dynamic motion of the drive is also demonstrated

and the digital prototype provides reference for physical prototype design on this precision transmission. This method can be applied to other similar mechanism design.