The impact of visual communication design has become increasingly influential in modern society. Exaggerated techniques inject a strong emotional color into the artistic beauty of visual communication design, making the work more appealing and causing a strong visual effect, which is without a doubt the key to adding color to the work. This paper mainly discusses the five forms of expression and function of exaggeration in visual communication design, the essence of exaggeration in visual communication design, and how to correctly use exaggeration techniques in visual communication design from the two perspectives of sensibility and rationality. Designers must fully understand the relationship between the exaggeration and authenticity of exaggerated techniques when using exaggerated techniques, grasp the "degree" of exaggerated techniques in visual communication design, and find the convergence of sensibility and rationality, so that exaggerated techniques can better serve visual communication design, otherwise it will produce negative communication effects.