NOVELTY - A biological organic fertilizer producing method involves cutting banana stem leaf. The banana stem leaf is dried. The banana stem leaf is cut down. Chicken manure and biological fermentation are added with the banana stem leaf followed by mixing and stirring to obtain a solid mixed raw material. Biological agent and epiphyte or actinomycete are added with the raw material. Water is added with the raw material followed by stirring to obtain raw material liquid. The raw material liquid is piled for 25-30 days and turned for 1-2 times to obtain biological organic fertilizer.    USE - Method for producing biological organic fertilizer.    ADVANTAGE - The method enables reducing production time, and maintaining nutrients in the stem leaf by using the biological fermentation.    DETAILED DESCRIPTION - A biological organic fertilizer producing method involves cutting banana stem leaf to 1.5 mm. The banana stem leaf is dried for 5-7 days, where water content of the banana stem leaf is 70%. The banana stem leaf is cut down by using a cutter to 2-3 cm. 5% of chicken manure and 0.1-0.2% of biological fermentation are added with the banana stem leaf followed by mixing and stirring to obtain a solid mixed raw material, where carbon/nitrogen molecular number ratio of the solid mixed raw material is 20-40. Biological agent and epiphyte or actinomycete are added with the solid mixed raw material, where the biological agent is selected from high temperature bacteria. Water is added with the solid mixed raw material followed by stirring to obtain mixed raw material liquid, where water content of the mixed raw material liquid is 60 to 70%. The mixed raw material liquid is piled for 25-30 days. The mixed raw material liquid is turned for 1-2 times to obtain biological organic fertilizer, where composting pH value of the fertilizer is 8-9.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating a method for producing biological organic fertilizer.'(Drawing includes non-English language text)'