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Aiming at the problems of complex topography, low level of potato mechanization and small planting scale in hilly mountainous areas of China, a triangular chain half cup spoonshaped potato precision planter was designed, which can realize the integration of fertilization, sowing, ditching and ridging, shaping, soilcovering and soilcompacting. The transmission mode of the “up and low” two sprocket of the traditional chain spoon potato planter was changed to the “triangular arrangement” of three sprockets, which increased the horizontal clearance area, relied on the gravity clear species, reduced the damage of seed potato, and realized the requirement of singlegrain precision sowing. Changing the spoontype device into a halfcup seedtaking device effectively increased the number of seed taken and improved the reliability of the seed taking. The working parameters of the fertilizer discharging system, the boottype opener and the seeding system were determined by the analysis and calculation. A set of ditching and ridging, shaping, soilcovering and soilcompacting device was designed to solve the problem of low ridge height and uneven ridge formation caused by large land viscosity in hilly mountainous areas. The field test results showed that when the working speed was 1.9~2.0km/h, the qualified grain distance index was 83.26%, the rebroadcasting index was 8.36%, and the missedairing index was 8.38%, the coefficient of variation was 22.31%, and the stability coefficient of the ridge height, ridge bottom width, ridge width and ridge distance were all above 97%. Performance index met national standards.