NOVELTY - A fungus is prepared by using modern biotechnology which aims at physiological and growing features of sea cucumbers, and water quality features of cucumber pools. Extracts of natural Chinese herbal medicines are applied to culture medium of fungus according to fungus exploitability for natural culture medium. Fungus with life-promoting substances can be obtained through liquid or solid fermentation. Additives of the Chinese herb are added to obtain the product.    USE - Preparation of fungus used as green environment-friendly compound cucumber-nourishing and cucumber-preserving product for nourishing sea cucumbers and repairing environment of the sea cucumber breeding pool.    ADVANTAGE - The method provides fungus that can adjust balance of micro-ecological flora in sea cucumbers intestinal canals, promote sea cucumbers digestion and absorption of fodder, and increases appetite and enhances immunity of sea cucumbers. After application of the fungus product to cucumber pool, resting living fungus can soon recover and reproduce, decompose excessive organic wastes in the pool, and transform and wipe off harmful substances in water. Beneficial substances of the fungus and the Chinese herbal medicine particles can inhibit permanent planting of pathogen and kill pathogenic factors.    DETAILED DESCRIPTION - Preparation of fungus comprises using modern biotechnology which aims at physiological and growing features of sea cucumbers, and water quality features of cucumber pools. Extracts of natural Chinese herbal medicines are applied to culture medium of fungus according to fungus exploitability for natural culture medium. Fungus with life-promoting substances can be obtained through liquid or solid fermentation. Additives of the Chinese herb are added to obtain the product. Micro-ecological preparation involves (A) taking plasma-sprayed (PS) anode gel starch, adding water and diluting 10 times, and disinfecting; (B) adding dissolved solution to already-prepared effective microorganism (EM) fungus solution, stirring the mixture until fungus flocculates appear, separating supernatant fluid and condensed flocculates, removing water with nylon filtering cloth, and collecting fungus cells; (C) adding type-B ultrasonic condensed EM fungus cells to dry sea mud powder, and stirring the mixture; (D) filtering khosam powder, ginger powder, and milkvetch root powder using 60-mesh sieve; (E) providing mixed liquid solution of photosynthetic bacteria, Lactobacillus, microenzyme, and ray fungi; (F) filtering rice bran powder using 60-mesh sieve; (G) mixing the filtered khosam powder, ginger powder, and milkvetch root powder, red sugar and water and stirring them; (H) pouring the mixture into fermentation pit and fermenting for 10-15 days, drying and smashing the mixture, and filtering with 80-mesh sieve to obtain Chinese herbal medicine compound fungus additive; and (I) mixing the fungus sea mud and Chinese herbal medicine compound fungus additives at a proportion of 6:4.