NOVELTY - A biological organic fertilizer comprises (in weight parts) lime powder (55-65), ferrous sulfate (12-18), magnesium sulfate (6-10), peanut cake powder (12-20), rice bran powder (10-20), waste plant powder (15-25), biological organic fertilizer fermenting strain agent (10-20), organic matter-decomposing inoculant (0.3-0.6), lysine (0.3-0.6), ammonium nitrate (0.2-0.5), mono-ammonium phosphate (3-6), potassium sulfate (6-8,) triacontanol (6-8), organic activating agent (0.02-0.05), paper making wastewater (0.2-0.6) and paper making sludge (45-65).    USE - Biological organic fertilizer for paper making sludge production.    ADVANTAGE - The fertilizer has various nutrients containing nitrogen, phosphorus, potassium, multiple trace elements and organic acid for crop growth, low manufacturing cost and better usage effect. The fertilizer protects environment, and saves land resource.    DETAILED DESCRIPTION - A biological organic fertilizer comprises (in weight parts) lime powder (55-65), ferrous sulfate (12-18), magnesium sulfate (6-10), peanut cake powder (12-20), rice bran powder (10-20), waste plant powder (15-25), biological organic fertilizer fermenting strain agent (10-20), organic matter-decomposing inoculant (0.3-0.6), lysine (0.3-0.6), ammonium nitrate (0.2-0.5), mono-ammonium phosphate (3-6), potassium sulfate (6-8,) triacontanol (6-8), organic activating agent (0.02-0.05), paper making wastewater (0.2-0.6) and paper making sludge (45-65). The paper making wastewater is produced from a domestic sewage factory and a living area. A peanut pulp with shell is used as a raw material and performed with mechanical squeezing to extract a product after oil sludge mechanical dehydration to water content of 45 wt% to 65 wt%. The peanut cake powder is dried by crushing, grinded, and prepared into granule with grain diameter of 0.18 mm, and the rice is separated from the rice bran powder by mechanical processing of a chaff waste after crushing. Domestic garbage treatment in the separating process is applied to waste wood. An INDEPENDENT CLAIM is also included for a biological organic fertilizer preparation method.