Abstract: The three B-spline curve in the actual project has been widely used. The three B-spline curve drawing system of any control points has not yet been found in the current literature. In order for B-spline curve to be more widely applied and for the “ComputerAided Geometric Design” course on the B-spline curve visual teaching to be userfriendly, this paper programms the three B-spline curve drawing system with Matlab GUI. The system interface is simple and easy to use. The screen coordinate system can be clicked with the mouse to input any control points. Any control points can also be entered by file way. Bspline curve equation may be described with matrix to achieve a quick count and draw a smooth curve of the three B-spline.

Key words: any control points, three B-spline, curve drawing, system design, visual teaching