Based on the principle of vibration damage for the granular mixtures overhead, a vibrational planter for rapeseed was designed to improve the planting efficiency of the small plots. The working principle and main structure of the vibratory planter were analyzed. The maximum frequency of metering device is 6.3 Hz, and maximum speed is 0.55 m/s. The relationship between rotation speed of ratchet and stability and consistency of the single row delivery capacity, the stability of the full delivery capacity was analyzed through the captive test of the seeding device. The experiments showed that the seeding device had good seeding stability and uniformity when the rotation speed range of ratchet was 20-40 r/min. The stability variability coefficient of the full seeding quantity is 1.08% and the consistency variability coefficient of seeding quantity is 2.74% when the rotation speed is 40 r/min, and the seed breakage is 0.38%,which meet the standard planter of the JB 6274.1-2001.