The invention discloses an antibacterial coating and pesticide modified soil conditioner, which comprises the following components in parts by weight: 2-4 parts of pulverized coal ash, 3-8 parts of zeolite, 4-7 parts of bentonite, 3.5 to 6 parts of weathered coal, 1.8-3.5 parts of lime, 2.7 to 6.5 parts of rice straw, 2.5 to 6 parts of wheat straw, 1-3 parts of rape stalks, 2-6 parts of cotton stalks, 3.5 to 6 parts of lignocelluloses, 4 to 7 parts of polyacrylic acid, 1.5 to 4 parts of vinyl acetate maleic acid, 3 to 8 parts of polyvinyl alcohol, 0.8 to 1.8 parts of bacillus licheniformis, 0.6 to 1.5 parts of bacillus subtilis, 0.5 to 1.2 parts of trichoderma harzianum, 0.4 to 0.9 part of paecilomyces lilacinus, 2 to 4 parts of bacillus megaterium, 4.5 to 5.5 parts of trichoderma, 1.7 to3 parts of photosynthetic bacteria and 18 to 40 parts of alkaline solution. Various plant straws and mineral soil are adopted as raw materials, the soil quality can be improved, the production cost can be reduced, various microbial bacteria are added, the effect of improving the soil structure is achieved, the air permeability of the soil is enhanced, and the micro-ecological environment of the soil is effectively improved.