NOVELTY - A water-efficient compound fertilizer comprises sea algae, waste paper, granular activated carbon, water bamboo leaves, plant ash, corncob, dyer's woad root powder, effective microorganism biological bacteria agent, potassium permanganate, potassium sulfate, ammonium borate, magnesium phosphate, sodium hyaluronate, potassium carbonate, ethanol, polybutadiene resin, sodium dodecyl sulfate, auxiliary agent, and water.    USE - Water-efficient compound fertilizer.    ADVANTAGE - The compound fertilizer reduces water loss, provides reasonable water supply, and improves soil quality.    DETAILED DESCRIPTION - A water-efficient compound fertilizer comprises 9-10 pts. wt. sea algae, 9-11 pts. wt. waste paper, 8-10 pts. wt. granular activated carbon, 8-12 pts. wt. water bamboo leaves, 10-13 pts. wt. plant ash, 10-12 pts. wt. corncob, 3-4 pts. wt. dyer's woad root powder, 2-3 pts. wt. effective microorganism biological bacteria agent, 5-6 pts. wt. potassium permanganate, 7-9 pts. wt. potassium sulfate, 4-6 pts. wt. ammonium borate, 3-4 pts. wt. magnesium phosphate, 2-3 pts. wt. sodium hyaluronate, 7-8 pts. wt. potassium carbonate, 2-3 pts. wt. ethanol, 3-4 pts. wt. polybutadiene resin, 1-2 pts. wt. sodium dodecyl sulfate, 6-8 pts. wt. auxiliary agent, and balance water. The auxiliary agent comprises 6-7 pts. wt. agar, 3-4 pts. wt. ethylene glycol dimethacrylate, 1-2 pts. wt. bamboo coal powder, 7-9 pts. wt. borax, 5-6 pts. wt. zinc borate, 3-5 pts. wt. glycerol, 1-2 pts. wt. zinc sulfate, 2-3 pts. wt. ammonium molybdate, 10-14 pts. wt. starch, and balance water. The auxiliary agent is prepared by mixing agar and starch, adding 50 pts. wt. water, heating while stirring to dissolve, adding remaining components, continuously heating while stirring for 70-80 minutes, and cooling to room temperature. An INDEPENDENT CLAIM is included for preparation of water-efficient compound fertilizer comprising crushing sea algae, waste paper, granular activated carbon, water bamboo leaves, plant ash, corncob and dyer's woad root powder into ultrafine dry powder, adding effective microorganism biological bacteria agent, diluting with 10 times water, adjusting water content to 30-35%, and fermenting to 35-48 degrees C for 20-22 days while turning once every 2 days; mixing potassium permanganate, potassium sulfate, ammonium borate, magnesium phosphate, sodium hyaluronate and potassium carbonate, adding 4-5 times water, heating while stirring to dissolve, adding ethanol, polybutadiene resin and sodium dodecyl sulfate, and stirring for 10-15 minutes to obtain mixture; adding granular activated carbon, and heating while stirring constantly for 20-30 minutes to obtain gummy mixture; and mixing with fermented material, adding auxiliary agent, mechanically stirring for 30-40 minutes, and granulating.