Abstract: In this research, focusing on the mechanical design of primate bionic robots, a biomimetic mechanical motion device is innovatively developed based on the principle of biomimicry, specifically addressing the unique locomotion mechanism of gibbons swinging and moving in the jungle, which overcomes the limitations of primate-inspired robotics in terms of interaction and human-machine collaboration. The paper discusses the design concept of the device, analyzes and calculates the differential speed control model for alternating left and right hand movements, as well as the oscillation period, and verifies the fitting of the motion pattern. In terms of mechanical structure design, the device integrates key components such as curved differential speed control of dual chain tracks and a rope extension mechanism, achieving a clever simulation of swinging and forward movement, which, when combined, simulates the leaping motion of gibbons in the jungle. This device not only serves as a fitness training tool but also functions as an entertainment facility, providing the users with an immersive experience of gibbons leaping in the jungle. Its integration of entertainment, fitness, and fun demonstrates extensive potential for application and market opportunities.