Abstract: In order to use organic fertilizer efficiently and reasonably in grape cultivation, five- year old ‘Xiahei’grape under protected cultivation was used as the experimental material and fertilized with different amount of organic fertilizer (22.5, 45, 90 t/hm2), to compare the plant growth and fruit quality among the treatments. The results showed that the organic fertilizer could promote plant growth, increase the photosynthesis rate and improve fruit quality. But when the organic fertilizer amount was increased to 90 t/hm2, the branches became longer and thinner with lower degree of maturity. Excessive increase in organic fertilizer to some extent, not only had a negative impact on the growth of‘Xiahei’grape, but also was a waste of production cost. It was concluded that the optimal amount of organic fertilizer for‘Xiahei’grape under protected cultivation was 45 t/hm2.