Abstract: On the basis of the results from the field experiments we came to reach the conclusion that potash had very significant effect on the yield of grape, moreover there was the well-simulated mathematical model between them：y=1887.4+97.6K-3.98K2; the preferable ratio of N to K2O was 16 to 12. The rational fertilizers combination should be appropriately adjusted according to the different grape varieties and soil fertility conditions when applying fertilizers.