Abstract: With the expansion of chili planting scale, the lack of suitable interplanting machinery, high labor costs, and low labor efficiency have seriously constrained the development of the chili industry.It is particularly important to develop a lightweight tracked vehicle suitable for “wheat pepper interplanting”.This article establishes the walking system structure of light tracked vehicles based on their usage environment, work objectives, and performance, and selects and designs the key components and parameters of the walking system; By analyzing the steering force of the lightweight tracked walking system, the maximum driving torque required for steering is calculated, and a hydrostatic device is selected based on this.This article provides a basis for the design of the walking system and accumulates technical information for subsequent deformation design.