Abstract: Planting rice in saline alkali soil is a main way to use soda saline alkali soil in Songnen Plain.In order to clarify the effect of water-soluble fertilizer that block salt and alkali on alleviating the harm of rice saline alkali.In this study,under the condition of straw returning,a field experiment was performed to investigate the impacts of water-soluble fertilizer that block salt and alkali on rice yield and quality in soda saline alkali land of Songnen Plain in Northeast China before rice transplanting and at tillering stage.The results showed that,compared with the conventional control,the application of water-soluble fertilizer that block salt and alkali significantly decreased the pH and EC of water by 3.80% and 4.93%,and significantly decreased the EC of soil by 11.65%,respectively,at the tillering stage.During the filling stage,the pH and EC of water and pH and EC of soil changed little.The rice grain yield significantly increased by 21.94%,the number of effective panicles significantly increased by 26.51%,the seed setting rate increased by 2.51%,the number of grains per panicle decreased by 8.18%,and the 1 000grain weight significantly decreased by 3.68%.The brown rice rate,milled rice rate and head rice rate showed a downward trend,the chalky grain rate and chalkiness significantly decreased by 33.49% and 54.95%,respectively.The taste value increased slightly,the amylose content and protein content decreased,and the net income was 813.86yuan·ha-1.In conclusion,the application of water-soluble fertilizer that block salt and alkali can significantly reduce the pH and EC of water and the EC of soil in the early growth stage,significantly improve rice yield,and obtain better economic benefits,which is beneficial to improve the appearance quality and cooking and eating quality of rice.