The invention discloses an environmentally-friendly biological pesticide for crops, and the environmentally-friendly biological pesticide comprises the following components by weight: 1-2 parts of bdellovibrio powder, 11-15 parts of aphid killing agent powder, 0.1-0.6 part of nikkomycin powder, 0.1-0.2 parts of Nanchangmycin powder, 0.3-0.4 parts of Shaoguanmycin powder, 1-2 parts of bezoar, 1-5 parts of achyranthes, 2-6 parts of cimicifugae foetidae, 3-7 parts of cortex moutan, 1-8 parts of salvia miltiorrhiza, 5-9 parts of thymus quinquecostatus celak, 5-8 parts of radix stemonae, 6-9 parts of chinaberry fruit, 4-10 parts of camphor, 11-32 parts of matrine, 9-12 parts of nicotine, 5-16 parts of cynanchum komarovii, 4-6 parts of radix euphorbiae lantu, 8-12 parts of chinaberry, 1-5 parts of an emulsifier and 100 parts of water. The environmentally-friendly biological pesticide for wheat is a new pesticide which is high-efficiency, purposeful, environmentally-friendly, free of secondary toxicity, residue and pollution, can keep ecological balance, is an important guarantee for realization of ecological agriculture, green ecological agriculture and green enterprises, and has broad prospects.