The invention mainly relates to the technical field of planting and discloses special tea tree antibacterial insecticide which is prepared from the following raw materials of tea seed cake, herba ajugae, herba siegesbeckiae, herba scuteliariae barbatae, folium baeckeae, fragrant eupatorium herb, horseweed herb, ventilago leiocarpa, sticktight herb, folium eucalyptus globulus, coral head plant seed, syzygium buxifolium leaf, folium ginkgo, white granulated sugar and lactobacillus plantarum. The special tea tree antibacterial insecticide is extracted from pure plant, a preparation and use process has no harm to human health, environmental friendliness is achieved, disease entities are prevented from generating drug resistance, antibacterial rate can be 89.3%, a killing rate can be 68.6%, and planting cost is saved by 16.2%. Varieties of biological enzyme and antibacterial substances are generated in a lactobacillus plantarum growing and fermenting process, so that effective ingredients are improved to be leached out, and an antibacterial effect is enhanced; volcanic rock can increase nutrient content of filtrate, improve absorption, enhance tea tree resistance and reduce plant disease and insect pest occurrence; all filtrate is absorbed by adding perlite after being concentrated, so that loss is avoided, moisture and fertility are preserved, tea tree growth is improved, and tea yield can be improved by 18.1%.