NOVELTY - Controlling ecological validity of water content in soil comprises mixing a bacterial manure base material and a bacterial cellulose including Acetobacter xylinum; preparing a bacterial manure base material with ecological validity of water content, and spraying a pulp liquid containing the bacterial manure base material on a soil surface; spraying a protecting pulp liquid containing polyacrylamide, and turning over after 5-7 days; and leveling soil.    USE - Method for controlling ecological validity of water content in soil (claimed).    ADVANTAGE - The method is simple and inexpensive, and improves water content of the soil.    DETAILED DESCRIPTION - Controlling ecological validity of water content in soil comprises uniformly mixing an organic fertilizer fermenting agent, edible fungus slag, and humic acid at a weight ratio of 1:600-800:15-30 to obtain a bacterial manure base material; inoculating 8-10 wt.% Acetobacter xylinum, culturing in a fermenting pot for 5-7 days under mechanical stirring at 28-30 degrees C for 200-500 revolutions per minute, and a ventilating amount of 0.25-1 L/minute to obtain a bacterial cellulose; uniformly mixing the bacterial manure base material and the bacterial cellulose at a weight ratio of 1:0.005-0.02 to obtain a bacterial manure base material with ecological validity of water content; adding (pts.wt.) bacterial manure base material (500-1000) with ecological validity of water content, expanded vermiculite (15-50), coal ash (30-60), super absorbent polymer resin (10-30), and water (3000-5000) to a hydraulic spraying sowing device, mixing to prepare a pulp liquid, and uniformly spraying on a soil surface with spraying thickness of less than or equal to 5 mm; mixing polyacrylamide (10-30), sodium bentonite (2-8), fibrilla (30-80), and water (250-500) to prepare a protecting pulp liquid, and uniformly spraying on the soil surface with a spraying thickness of less than or equal to 3 mm; turning over by machine after 5-7 days, and repeating spraying on the soil surface; uniformly turning over by machine after 5-7 days; and leveling soil.