The invention discloses an improvement method of wine making vineyard acid soil. The method is characterized by comprising the following steps of firstly performing air drying or sun drying treatmenton winter cut branches in a vineyard; then, performing high-temperature low-oxygen treatment; next, crushing the branches into powder to obtain charcoal powder; next, directly performing crushing treatment on waste of summer cut new branches, sub branches, leaves and the like in the vineyard; performing high-temperature fermentation treatment on the crushed materials, livestock and poultry manureand the like to obtain a grape organic fertilizer; next, performing high-temperature and crushing treatment on natural ore to obtain a soil conditioning agent; finally, mixing the grape charcoal powder, the grape organic fertilizer and the soil conditioning agent according to the proportion; next, uniformly applicating the material into the soil after the grape harvesting and before the grape bleeding period in a second year. The used wine making vineyard waste is a soil improving agent prepared from major raw materials through processing; the acid soil can be improved; the soil fertility andbuffer capability can be improved; the circulation utilization of the vineyard waste can also be realized; the fertilizer consumption is reduced; the grape growth and the absorption on nutrition elements can be promoted; the wine-making grape quality is improved; the method is suitable for popularization.