Abstract: Based on the principle of virtual prototype machines, the kinematics simulation system for the CK1416 type lathe was developed to provide a basis for quickly designing and optimizing lathes. A designer can not only observe the three-dimensional dynamic movements of the whole lathe in the virtual circumstance, but also forecast accurately and solve possible problems during design before the prototype is manufactured, assuring the feasibility of design scheme, shortening the period of product design and reducing the cost of production.