at the problem that the existing or

at the problem that the existing orienting device had poor orientation effect on hybrid garlic seeds, the mechanical-water floating orienting device for garlic seeds was designed and its working principle was analyzed. The key components were designed and selected, and orientation test for garlic seeds was carried out. The single-factor test results showed that the rate of seed scaly upward basically increased with the increase of hopper opening diameter. While the rate of seed scaly upward showed a downward trend with the increase of hopper taper. The speed of hopper entering water had no significant effect on the rate of seed scaly upward. Besides, the rate of seed scaly upward showed a trend of increasing first and then unchanged with the extension of hopper immersion time. Taking hopper opening diameter, hopper taper and hopper immersion time as test factors, and the rate of seed scaly upward as index, a quadratic regression orthogonal test with three-factor three-level was carried out. According to the results, a response surface mathematical model was established to analyze the impact of various factors on the rate of seed scaly upward. The optimized results showed that the better combination of parameters were that the hopper opening diameter was 18 mm, the hopper taper was 30° and the hopper immersion time was 3 s. A verification test was carried out on the optimal combination, the results showed that the rate of seed scaly upward in this combination was 87.8%, and the mechanical-water floating orienting device had made an improvement in the rate of seed scaly upward compared with the existing orienting device. This study could provide theoretical basis and technical support for the study of seeding equipment for hybrid garlic seeds.