NOVELTY - Preparing bioorganic fertilizer by diluting bacterial culture with water, mixing fresh chicken manure, silkworm excrement, silk reeling concentrated liquid waste, rice bran and hull, peat and calcium superphosphate, adding diluted bacterial liquid, mixing all the materials, stacking mixture, subjecting mixture to natural fermentation, heating fermented mixture, turning mixture, dehydrating fermented material, drying dehydrated material, crushing dried material, sieving crushed material and packing sieved material.    USE - The method is useful for preparing bio-organic fertilizer used for improving soil conditions and enhancing disease resistance in plants.    ADVANTAGE - The method is simple, requires simple production equipments and small floor area, enables preparation of the fertilizer containing high quantity of probiotics, within short period of time and being environmentally-friendly when compared to existing chemical fertilizers, as the raw materials are natural products. The raw materials used for preparation of the fertilizer are cost-effective and have wider source of availability, and also effective utilization of wastes chosen from chicken manure, silkworm excrement and silk reeling concentrated liquid waste in preparation of the fertilizer is enabled.    DETAILED DESCRIPTION - Method for preparing bio-organic fertilizer, involves (a) preparing fermenting bacterial liquid by diluting bacterial culture with water for 8-12 hours, (b) mixing and stirring raw materials comprising 30-70 pts. wt. fresh chicken manure, 0-40 pts. wt. silkworm excrement, 0-15 pts. wt. silk reeling concentrated liquid waste, 10-20 pts. wt. rice bran and hull, 8-12 pts. wt. peat and 2-8 pts. wt. calcium superphosphate in predetermined weight proportions by stirrer, (c) adding diluted fermenting bacterial liquid obtained in the step (a) during the stirring process, mixing all the materials constantly to obtain mixture, and maintaining moisture content in the mixture at 45-60 wt.% and carbon to nitrogen ratio as 20-30:1, (d) stacking the mixture in the indoor space, subjecting the mixture to natural fermentation process for 20-25 days, heating fermented mixture at 60 degrees C, and turning the mixture for 3-5 times, and (e) dehydrating obtained fermented material when fermentation process is completed, drying dehydrated material, crushing dried material, sieving crushed material and packing sieved material to obtain the fertilizer.