By planting and returning spring rape green manure for two consecutive years，the effects of returning of different spring rape varieties on soil zinc form change and availability were studied，and the regularity of zinc forms transformation in the soil and influencing factors were revealed.In this experiment，9 spring rape varieties were selected for returning to the field，and soil samples were collected at harvest of maize to determine the zinc content of different forms and other related indicators.The results showed that compared with CK treatment，spring rape returning significantly reduced the soil pH. The soil organic matter content，moisture content，total reducing substances after being returned with Zhongyoufei1804 and Zhongyoufei1901 were significantly increased by 61.60% and 45.02%，11.65% and 11.04%，264.36% and 252.87%，compared with CK treatment，respectively.The soil available zinc content after being returned by Zhongyoufei1804 were significantly increased by 73.99% compared with CK treatment.Compared with CK treatment，after Zhongyoufei1804 and Zhongyoufei1901 were returned，the content of soil exchangeable zinc and organically bound zinc increased by 168.86% 156.60%，48.47% and 44.87%，respectively.The returning of spring rape significantly increased the transformation factor of soil zinc and decreased the oxide-bound zinc；the returning of different spring rape varieties had no significant effect on the residual zinc.Redundant analysis results showed that spring rape returning affected soil zinc form distribution in many ways，and soil pH and spring rape zinc content were important factors.In summary，planting and returning of Zhongyoufei1804 and Zhongyoufei1901 in North China are the best biofortification methods to improve the availability of soil zinc.