Abstract: A real-time simulation technique for writing behavior of Chinese calligraphy brush was presented. In terms of the geometric shape of brush, the modeling method of the skin-skeleton was adopted, and a fast algorithm for the rotation parameters of the bone was proposed, which realized the two deformation effects of the pen head during the movement process; in terms of the ink effect, the ink diffusion model based on the particle system was adopted, and it could flexibly control the effect of ink on the paper surface. Based on the above techniques, using a head-mounted display and a force feedback device, a brush writing simulation system was implemented. Results show the better real-time and immersive feeling.