The invention discloses a biological pesticidal organic fertilizer which is prepared from the following components in a certain weight ratio: rapeseed meal, dregs of traditional Chinese medicines, bamboo sawdust, slow-release potassium chloride, paulownia sawdust, Celastrus angulatus, patrinia, cow and sheep manures, nitrogen-phosphorus-potassium compound fertilizer, biological bacteria, zinc sulfate, magnesium sulfate, sodium molybdate and borax. The fertilizer prepared in the invention greatly reduces utilization amount of organic pesticides and fertilizers, is prepared from natural pure plant Chinese herbal medicines, poses no pollution to the environment and crops, has an effect on improving soil, is both a fertilizer for crops and a pesticide, can protect the original ecological environment and benefit the mankind, and represents general course of future agricultural development.