Comparison research was carried out on the performance of self compensation and auxiliary compensation in seed metering device, in order to solve the issue of missseeding in notillage corn planter. The performance indicators of metering device at different disc speeds and seed spacing were obtained through the performance test of horizontal disc seed metering device, and the indicators included seeding qualification index, missseeding index and reseeding index. Based on these, the reseeding performance under self compensation and auxiliary compensation methods for missing seeding could be analyzed. The test result showed that when the seeding speed was from 3km/h to 7km/h and the seed spacing was 15cm, 20cm and 25cm, the qualification index of the metering device was decreased with the increase of the seeding speed, and the smaller the seed spacing was, the lower the qualified rate was at the same speed; the missseeding index was increased with the increase of seeding speed, and the smaller the seed spacing was, the higher the missseeding index was. The analysis of the performance of self compensation for missseeding shows that after detecting missseeding signals at the seeding metering port and carrying out accelerated reseeding, the actual seed spacing LPR was larger than 1.5L, and the reseeding spacing was still missseeding, despite that the missseeding spacing was lowered, where precise missing reseeding function could not be realized. In case the missseeding signal could be detected before the seed left the metering hole, and the acceleration preparation was made in advance, then the missseeding could be realized. Selfcompensation for missed seeding was greatly affected by seeding speed and seeding spacing. When the seeding spacing was 20cm and 25cm and the seeding speed was not more than 5km/h, the qualified rate of reseeding was above 88%. When the seeding spacing was 15cm or the seeding speed was above 5km/h, the qualified rate of reseeding was lower. The performance of variable speed seeding would gradually weaken with the increase of seeding speed. Through the analysis of the performance of the auxiliary compensation device for missseeding, at the seeding speed of 3~7km/h and the grain spacing of 15~25cm, the success rate of reseeding was above 89%, and the qualified rate of reseeding was above 96% at the seeding speed of 5km/h or below. It was concluded that the reseeding position should be ensured to be precise, where the installation position of the compensation device for missseeding should be reasonably designed. In the meantime, after reasonably design of the compensation reseeding device installation indicators, the t (response time) and vb (linear speed of compensation device seeding discs) should be controlled to realize the precise control of the reseeding position, as they may be affected by seeding speed, seeding spacing, seeding disc linear speed and the seeding angle. 