The invention discloses a plant bud grafting wound healing agent. The plant bud grafting wound healing agent is prepared from, by weight, 6-8 parts of polyvinyl alcohol, 10-16 parts of water, 3-5 parts of sodium humate, 2-4 parts of nutrient element additive, 0.01-0.05 part of chitooligo saccharide, 0.5-0.9 part of iron vitriol, 1-2 parts of bactericide, 12-14 parts of a protective agent, 2-3 parts of a tackifier, 2-4 parts of nutrient and 0.1-0.3 part of auxin. The healing agent can effectively avoid bud grafting incisional wound infection and rotting, bacterium infection is avoided, water evaporation is reduced, wound healing is promoted, the bud grafting success rate is increased, the healing agent integrates sterilization, nourishment and moisturizing, use is flexible and convenient, the effect is outstanding, the safety is high, and rain wash resistance is good; meanwhile the preparation method is low in material cost, raw materials are easy to obtain, the technology is simple, and the high practical value and the good application prospect are achieved.