NOVELTY - A compound fertilizer includes 4-6 pts. wt. Bacillus subtilis, 6-9 pts. wt. enzymes, 1200-1400 pts. wt. waste precipitate, 380-420 pts. wt. inorganic fertilizer, 50-60 pts. wt. trace element, 25-32 pts. wt. adhesive, 45-55 pts. wt. Artemisia rupestris, 40-50 pts. wt. semen momordicae, 20-30 pts. wt. pepper, 20-30 pts. wt. ginkgo skin, 20-30 pts. wt. common cnidium fruit, 10-30 pts. wt. cortex meliae,15-25 pts. wt. Quisqualis, 55-60 pts. wt. Sapindus, 10-15 pts. wt. fructus ulmi, and 0.6-1 pts. wt. growth regulator agent.    USE - A compound fertilizer used for preventing and treating downy mildew in spinach (claimed).    ADVANTAGE - The fertilizer improves spinach yield.    DETAILED DESCRIPTION - A compound fertilizer comprises 4-6 pts. wt. Bacillus subtilis, 6-9 pts. wt. enzymes, 1200-1400 pts. wt. waste precipitate, 380-420 pts. wt. inorganic fertilizer, 50-60 pts. wt. trace element, 25-32 pts. wt. adhesive, 0.8-1 pts. wt. stabilizer,45-55 pts. wt. Artemisia rupestris, 40-50 pts. wt. semen momordicae, 1-15 pts. wt. Stellera chamaejasme, 5-10 pts. wt. hops, 5-10 pts. wt. radix sophorae flavescentis, 10-15 pts. wt. Pseudolarix amabilis, 20-30 pts. wt. pepper, 20-30 pts. wt. ginkgo skin, 20-30 pts. wt. common cnidium fruit, 10-30 pts. wt. cortex meliae, 15-25 pts. wt. Quisqualis, 1-15 pts. wt. nutgall, 5-15 pts .wt. pubescent holly root, 55-60 pts. wt. Sapindus, 10-15 pts. wt. fructus ulmi, 5-15 pts. wt. camphor, 0.6-1 pts. wt. growth regulator agent. An INDEPENDENT CLAIM is included for preparing the compound fertilizer, comprising processing waste precipitate by air-curing waste precipitate to obtain a moisture content of 55-65%, drying to obtain a moisture content of 15-20%, crushing, adding 3-5% lime, uniformly stirring, bag stacking for more than 2 days at a pH is 6-7.5; adding enzyme to the processed waste precipitate, mixing and stirring, carrying out aerobic high temperature solid state open fermentation at 60-70 degrees C for 7-10 days; dissolving inorganic fertilizer, trace element, adhesive, stabilizer, A. rupestris, semen momordicae, S. chamaejasme, hops, radix sophorae flavescentis, P. amabilis, pepper, ginkgo skin, common cnidium fruit, cortex meliae, Quisqualis, nutgall, pubescent holly root, Sapindus, fructus ulmi, and camphor in water; mixing with the fermented product and growth regulator agent; and adding B. subtilis, fluidized bed drying at 80 degrees C, controlling moisture content at 10-15%, crushing and sieving to 60-80 meshes, steam heating at 50-60 degrees C, hot wind drying, cooling, sieving and packing.