Abstract: Physiological dormancy process is that seed mature in the harvest will have a certain time after the ripening process. The time of seed ripening of different crops was different, which has a relationship with the external environment and their own conditions.The seeds of different growth status in the same time was harvested, and the germination test was carried out in the same time.The results showed that the c]oser it get to the mature harvest time, the shorter the time of seed dormancy ;in the same ear, moving closer to the top of the ear the shorter the time of seeds after-ripening. Preliminary experiment explored the general regulation of seed dormancy after-ripening in order to provide help and reference for production.