NOVELTY - Biological compound fertilizer, comprises 20-25 pts. wt. activated humic acid, 15-20 pts. wt. urea, 10-15 pts. wt. diammonium phosphate, 15-20 pts. wt. potassium sulfate, 2-4 pts. wt. borax, 2-4 pts. wt. magnesium sulfate, 2-4 pts. wt. zinc sulfate, 2-4 pts. wt. ferrous sulfate and 5-15 pts. wt. microbial inoculums. Preparing biological compound fertilizer, comprises e.g. grinding low grade humic acid to 80-100 mesh, humic acid particles, bean cake powder and urea in 100:5:20-25 ratio, adding fermentative bacteria, adjusting moisture and fermenting to obtain biologically activated humic acid.    USE - Used as biological compound fertilizer.    ADVANTAGE - The fertilizer: is economical, environmentally friendly, applied to low-grade humic acid resources; has humic acid, which increases fertilizer utilization rate, silicate microbial inoculums, which increases utilization of phosphorus and potassium fertilizer; reduces utilization of chemical fertilizer by about 20%; turns waste into treasure; and utilizes raw materials, which are easily available.    DETAILED DESCRIPTION - Biological compound fertilizer, comprises 20-25 pts. wt. activated humic acid, 15-20 pts. wt. urea, 10-15 pts. wt. diammonium phosphate, 15-20 pts. wt. potassium sulfate, 2-4 pts. wt. borax, 2-4 pts. wt. magnesium sulfate, 2-4 pts. wt. zinc sulfate, 2-4 pts. wt. ferrous sulfate and 5-15 pts. wt. microbial inoculums. Preparing biological compound fertilizer, comprises grinding low grade humic acid to 80-100 mesh, humic acid particles, bean cake powder and urea in 100:5:20-25 ratio, adding 1/3 total quantity of fermentative bacteria, adjusting material moisture to 40%, fermenting at 20-40 degrees C for 10-15 days to obtain biologically activated humic acid, drying activated humic acid, taking diammonium phosphate, potassium sulfate, borax, magnesium sulfate, zinc sulfate and ferrous sulfate, drying, grinding to 80-100 mesh along with activated humic acid, capsulating fertilizer granules using talc powder and packaging.