Three-dimensional animation is a new industry, which can also be called CG industry (abbreviation of computer graphics). As a branch of computer graphics, 3D animation is a relatively independent new art form based on animation art and computer software and hardware. Three-dimensional animation has the characteristics of artistic space, scene simulation and effective production. Three-dimensional animation is a kind of computer animation based on physical model, which follows the real kinematics and its laws. The animation of 3D modeling design has always been the ultimate goal pursued by animation developers and users. The rapid development of three-dimensional technology has brought endless changes and improvements to animation art. The purpose of this paper is to explore the expression principle of three-dimensional animation solid modeling in order to promote creative practice.

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