The biological snake has several kinds of motion modes, such as winding movement, peristalsis and rolling lateral movement, and has the ability to survive in various environments on land and water. According to the motion characteristics of biological snakes, researchers put forward bionic robots, which make snake robots have the same advantages as snakes, and use them in various complex scenes to assist human rescue activities. Based on the structure optimization design of reconfigurable modular intelligent snake robot, this paper puts forward the idea of three-dimensional multi-motion simulation.