The invention discloses a celastrus angulatus and cnidium lactone compounded pesticide which consists of the following raw materials in parts by weight: 0.1-5 parts of celastrus angulatus, 0.1-5 parts of cnidium lactone, 5-15 parts of solvent, 5-15 parts of emulsifier, 1-6 parts of dispersant, 0.5-2 parts of antioxidant, 0.5-1 part of stabilizer, 0.5-10 parts of penetrant, 1-10 parts of anti-freezing agent, 1-3 parts of antifoaming agent and the balance of bamboo vinegar liquid or wood vinegar liquid based on 100 parts. The pesticide is prepared by six steps of filtration of bamboo (wood) vinegar liquid, preparation of an oil phase, preparation of a water phase, preparation of a mixed solution, preparation of pesticidal suspension emulsion and the like, is mainly used for preventing pear gall midge, shows an obvious synergistic effect, and realizes a good field control effect. The pesticide disclosed by the invention prevents drug resistance of pests after long-time use, can be automatically degraded, is safe and efficient to use, avoids pollution, and has low cost and good persistence.