The invention discloses a special organic fertilizer for grapes. Organic fertilizer extract liquid is used as base liquid, and potassium sulphate, potassium dihydrogen phosphate, urea, superphosphate, magnesium sulfate heptahydrate, zinc sulfate heptahydrate, sodium borate and the like are added in the organic fertilizer extract liquid. The special organic fertilizer for grapes consists of elements including, by weight percentage, from 22.0 to 24.0% of nitrogen, from 11.0 to 12.0% of phosphorus, from 11.0 to 12.0% of potassium, from 0.6 to 1.2% of calcium, from 0.7 to 1.4% of magnesium, from 1.8 to 2.8% of sulphur, from 0.08 to 0.1% of zinc and from 0.18 to 0.2% of boron. The utilization rate of the fertilizer can be increased, the zinc in the fertilizer can increase the number of grapes in each grape bunch, the boron can improve shriveling of the grapes, the number of shriveled grapes is reduced, similar maturity of the grapes can be prompted, growth of the grapes is promoted, yield of the grapes is increased, and quality of the grapes is improved.