The invention discloses a biological pesticidal 
organic fertilizer and a preparation method thereof. The biological pesticidal 
organic fertilizer is prepared from the following raw materials in parts by weight: 40-50 parts of pig 
manure, 20-30 parts of tea seed pulp, 10-15 parts of 
coffee grounds, 8-12 parts of 
paulownia sawdust, 5-10 parts of 
phosphogypsum, 4-8 parts of corn cob, 5-10 parts of pepper seed cake, 10-15 parts of 
mushroom dreg, 8-12 parts of wheat 
bran, 15-20 parts of 
bentonite, 10-15 parts of opoka, 2-3 parts of 
ferrous sulfate, 1-2 parts of 
manganese sulfate, 3-5 parts of 
humic acid, 1-2 parts of chinese 
tallow tree root and 
bark, 2-3 parts of 
sophora alopecuroides, 1-2 parts of 
stemona, 1-3 parts of 
Artemisia annua, 1.5-2.5 parts of 
ailanthus leaf, 2-3 parts of 
derris and 1-2 parts of Radix Euphorbiae Ebractealatae. The 
organic fertilizer disclosed by the invention has multiple effects of providing nutrients, improving the 
soil structure, preventing and treating pests and diseases and the like, can promote the crops to quickly grow, enhances the stress tolerance of the crops, can have favorable preventing and treating effects on nematodes and soil insects, reduces or avoids use of chemical pesticides, enhances the 
soil fertility, regulates the ecological equilibrium of soil, improves the quality of agricultural products, has no chemical residues, and implements yield increase and income increase of agricultural products.