To reveal the driving effect of rice on form transformation of Zn in soda-saline-alkali soil and its mechanism, Tessier continuous extraction method was used to study the content of Zn in different forms in soda-saline-alkali soil and its distribution characteristics in soil profile in Songnen Plain under different planting years. The results showed that the improvement of saline-alkali soil by planting could significantly enhance the contents of available Zn, exchangeable Zn and organism combined Zn, and other bio-available Zn in all soil profile, but reduce the contents of carbonate combined Zn, oxide combined Zn, residual Zn and other non-bio-available Zn. The effect was the most significant in the first year after planting, and then entered the gentle rising stage after the fifth year. The promoting effect of planting on the contents of available Zn, exchangeable Zn, organism combined Zn and other bio-available Zn weakened with the deepening profile level. Correlation analysis showed that exchangeable Zn and organism combined Zn had a significant negative correlation with pH, but a significant positive correlation with organic matter content respectively. Carbonate combined Zn and oxide combined Zn showed a significant positive correlation with pH but a significant negative correlation with the organic matter content, indicating that after saline-alkali soil improvement by planting, the decrease in soil pH and increase in organic carbon contents were the main factors for driving the transformation of Zn in different forms.