NOVELTY - A fermented composite fertilizer comprises (pts.wt.) alcohol anaerobic sludge (680-810) containing 50-55 wt.% water, coal ash (10-15), coal powder (60-70), phosphogypsum (50-60), potassium chloride or potassium sulfate (3-5), urea (9-11), rock phosphate powder (45-55), Streptomyces microflavus microorganism agent (1.5-2), and multivitamin composite enzyme agent (1.5-2).    USE - Fermented composite fertilizer used in planting greenhouse vegetables (claimed).    ADVANTAGE - The fertilizer is a resource-saving and an environment-friendly biological organic fertilizer, improves vegetable and soil quality, provides comprehensive nutrients, and can control loss of inorganic fertilizer in plant material, and provide vegetable products achieving green food standard. Further, the fertilizer provides carbon source substances and microorganism having crop physiological stimulation and metabolic enhancement effects.    DETAILED DESCRIPTION - A fermented composite fertilizer comprises (pts.wt.) alcohol anaerobic sludge (680-810) containing 50-55 wt.% water, coal ash (10-15), coal powder (60-70), phosphogypsum (50-60), potassium chloride or potassium sulfate (3-5), urea (9-11), rock phosphate powder (45-55), Streptomyces microflavus microorganism agent (1.5-2), and multivitamin composite enzyme agent (1.5-2). The coal ash is fly ash collected after de-dusting coal firing boiler flue gas, waste slag discharged after desulfurization of flue gas, and/or boiler bottom ash. The phosphogypsum is solid waste slag discharged after decomposing rock phosphate by sulfur and extracting the phosphoric acid in a wet-method phosphate fertilizer production device. The rock phosphate powder is low-level rock phosphate powder containing phosphorus pentoxide of less than 25%. The fermented composite fertilizer is prepared by weighing and mixing the raw materials in an alcohol aerobic fermentation device plate; controlling carbon/nitrogen ratio (C/N) to 20-30 and pH to 5.5-8; mixing the raw materials uniformly; performing discontinuous windrows preparation and primary aerobic fermentation; finishing the primary aerobic fermentation under a natural environment after reducing water content of the materials to 40-50%; preparing a secondary aerobic fermentation; performing continuous groove-type secondary aerobic fermentation by adding multivitamin composite enzyme agent (2-2.5 pts.wt.) to the materials after performing the primary aerobic fermentation; conveying the mixture to a continuous fermentation groove by a belt conveyor and a spiral conveyor; performing the secondary aerobic fermentation for 7 days; preparing to age the fermented product after reducing water content to less than 30%; conveying the materials after performing the secondary aerobic fermentation to a warehouse by a forklift, stacking and aging the materials; and packaging and storing the materials after screening and checking the qualified materials.