PROBLEM TO BE SOLVED: To provide a control-difficult soil disease-preventing compost using a Ganoderma amboinense mushroom bed without an agricultural chemical, and to provide a method for producing the same.SOLUTION: The method for producing the Ganoderma amboinense antimicrobial compost using the antimicrobial property and high immunity-imparting function of Ganoderma lucidum-Ganoderma lucidum to plants in a large amount at a low cost comprises proliferating the mycelia of the Ganoderma lucidum-Ganoderma amboinense and composting the proliferation product to attain the prevention in the expansion of control-difficult soil diseases.【課題】化学農薬によらない、鹿角霊芝菌床を活用した難防除土壌病害予防堆肥とその製造方法の提供。【解決手段】難防除土壌病害の拡大防止を図るため、万年茸・鹿角霊芝の菌糸を増殖して堆肥化し、万年茸・鹿角霊芝の抗菌性及び植物に対する高免疫性付与機能を活用した霊芝抗菌堆肥の大量生産による、低コスト製造方法。【選択図】なし