The effect of deodorization process on the quality of sunflower seed oil was studied,the sunflower seed oil was deodorized for different time at different temperatures,the changes of acid value, peroxide value, the content of tocopherol, squalene,sterol and trans fatty acid were analysed. The results showed that with the deodorization temperature and time increased,acid value and peroxide value decreased gradually, the content of tocopherols, squalene,sterols significantly reduced, the content of trans fatty acid increased. According to the study on the quality of deodorized sunflower seed oil which was deodorized for different time at different temperatures,we hope to provide the data support for the actual deodorization process of sunflower seed oil.