The combination of computer technology and calligraphy art is better applied to people’s daily lives while promoting the popularization and development of calligraphy art. In this paper, the mechanical model of the brush tip is constructed on the basis of the spring-vibrator model according to the relationship between the force and the deformation of the brush tip in the real calligraphy creation and drawing. The projection plane is constructed by the method of mapping, and the two-dimensional brush strokes generated on the projection plane are mapped onto the surface of the three-dimensional model in real-time, and the method of minimally enclosing the sphere of the brush tip is used to solve the normal vector direction of the plane. Finally, the orthographic projection of the contact area between the brush and the plane is taken as the brush stroke, and the real brush stroke is simplified to be fitted by two symmetric B-spline curves. The results show that the maximum value of the relevant parameter of the sine equation in the four simulations of the regular script style is 1.5075, which has the best-fitting effect. After 300 iterations of calligraphic creation style evolution, the style recognizability reaches 24.8. The method feeds back the process of recreating calligraphic style and increases the interactivity of calligraphic creation.