Three-dimensional (3D) saddle shape model is built by using SolidWorks software in this paper. Then import the saddle model into a robot off-line programming system. Finally, the simulation study of the SIASUN robot off-line programming system can be used after collecting the saddle model and saving the recognized data type of the robot. Singularities can appear during the period of simulation study. These singularities can disappear after continually adapting the data of saddle model and finally run the predefined program. The robot can be seen moving based on the predefined route within the simulation software interface.