The invention discloses a special organic fertilizer for dragon fruit anthracnose inhibition and a preparation method thereof, and belongs to the technical field of fertilizer preparation. The specialorganic fertilizer for dragon fruit anthracnose inhibition comprises the following raw materials: a Chinese herbal extract, a Chinese herbal residue, soybean meal, a tea residue, a cassava residue, animal manure, fish bone meal, garlic oil, a Chinese honeylocust fruit, ginger powder, plant ash, trace elements, biological bacteria and a water retention agent. Through combination of the Chinese herbal extract, the tea residue and the Chinese herbal residue, the soil permeability and the water retention can be improved; through addition of the garlic oil, the Chinese honeylocust fruit, the ginger powder and the Chinese herbal extract as the components, growth of anthracnose bacteria can be effectively inhibited, and termites, ground nematodes and other common diseases and pests during dragonfruit planting can be repelled, so that the yield of dragon fruits is increased and the quality of the dragon fruits is improved.