NOVELTY - Bio-organic fertilizer and its production method are claimed. The bio-organic fertilizer comprises dried silkworm excrement, sewage sludge, residues, pig-chicken manure, starch waste and soil binder. The fertilizer is produced by drying weighed silkworm excrement, crushing dried silkworm excrement, placing crushed product in mixer, adding sewage sludge, residues, pig-chicken manure and starch waste and soil binder, adding deodorizing agent, fermenting mixture, filtering fermented product, granulating liquid filtrate, tower-drying granules and bagging dried granules.    USE - The bio-organic fertilizer is useful for crops preferably root crops.    ADVANTAGE - The bio-organic fertilizer is rich in natural organic matter, exhibits broad-spectrum antibacterial effect as the silkworm excrement on fermentation produces peptide having efficient antibacterial activity, contains consistent and balanced amount of organic substances and trace elements, dissolves actively in water to provides various bioactive substances that are readily absorbed/uptake by the crops and hence disease resistance ability of the crops is increased, and fixes nitrogen rapidly in soil and hence reduces usage amount of additional nitrogenous fertilizer. The fertilizer is rich in silkworm excrement derived chlorophyll, and hence photosynthesis in crops is increased, absorption of various trace elements in the root crops is accelerated, and nutrient absorption rate in crops and utilization rate of fertilizer by the crops are significantly increased.    DETAILED DESCRIPTION - Bio-organic fertilizer and its production method are claimed. The bio-organic fertilizer comprises 15 wt.% dried silkworm excrement, 40 wt.% sewage sludge, 20 wt.% residues, 10 wt.% pig-chicken manure, 5 wt.% starch waste and 10 wt.% soil binder. The bio-organic fertilizer is produced by (a) weighing dried silkworm excrement in the above-mentioned weight proportion, drying weighed silkworm excrement, crushing dried silkworm excrement, placing obtained crushed product in mixer, adding the sewage sludge, residues, pig-chicken manure and starch waste and soil binder in the above-mentioned weight proportions to the mixer and adding deodorizing agent under constant stirring condition to obtain mixture, and (b) adding the mixture to fermentation tank, fermenting the mixture at 25-40 degrees C for 40 hours, filtering obtained fermented product by filtration device to obtain liquid filtrate, adding the liquid filtrate to granulating machine, granulating the liquid filtrate, tower-drying obtained granules and bagging dried granules.