Algae extract can promote plant growth and is widely used in fertilizer synergist.In this study,seaweed fertilizer was prepared by mixed degradation of seaweed,and the effects of different proportions of Laminaria japonica aresch and Enteromorpha prolifera on the growth and quality of strawberry in greenhouse were studied.The results showed that the effect of mixed degradation was superior to the single degradation,as well as Laminaria japonica aresch and Enteromorpha prolifera with mass ratio of 1∶2 had the best performance.And at this ratio,chlorophyll content increased by 3.59%,relative leaf area increased by 32.93%,leaf thickness increased by 4.44%,blossom in the same period increased by 67.86%,fruit number in the same period increased by 25%,fruit growth rate increased by 18.87%,yield increased by 15.27% and sugar content of fruit increased by 15.41%,vitamin content increased by 6.75%.And the test also concluded that Enteromorpha prolifera extract was better than Laminaria japonica Aresch extract.The results showed that the seaweed extract with different raw materials showed better effect in strawberry cultivation,which could be an important reference for the utilization of Enteromorpha prolifera and the improvement of seaweed utilization efficiency.