Panax notoginseng is mainly grown in Yunnan Province. The row spacing and plant spacing of the seedlings of Panax notoginseng are about 5cm. In order to achieve highdensity precision seeding of Panax notoginseng，overcome the problem of easy blockage of trenching，a hole precision seedmetering device was designed. The main structure and the working principle of the metering device were expounded. The key structure parameters were determined through theoretical calculation according to planting requirements. According to the extensive testing combined with the experimental results of relevant scholars，the main factors which affected seeding performance of holedrop planter precision seedmetering device were determined，which were pricking hole column diameter，forward velocity and dropping seeds point to the pricking hole roll distance. The Panax notoginseng seeds in Wenshan were chosen for sowing object. Based on the threefactor fivelevel quadratic orthogonal rotating combination test method, the influences of pricking hole column diameter，dropping seeds point to the pricking hole roll distance and forward velocity on sowing performance were explored. The experimental results showed that the influence of negative pressure on the qualified rate was very significant (P<001). Based on the results of examination，it was found that the fitting of the equations was good，the best parameter combination was pricking hole column diameter of 24.5~29.5mm， forward velocity of 0.44~0.61m/s and dropping seeds point to the pricking hole roll distance of 330mm， and under the optimal condition，the qualified index was more than 90%，the missing index was less than 5% and the multiple index was less than 5%. The holedrop planter precision seedmetering device met the standard and requirements by comparing the results with the national standard and Panax notoginseng planting requirements. Field experiments were conducted to examine the performance of 2BQ-15 type precision planter for Panax notoginseng，the qualified index of the plantor was up to 93.5%，when the operating speed was 0.35m/s. The results indicated that precision seeding device for holedrop planter can meet the requirements of Panax notoginseng seeding.