The invention provides a compound continuous-cropping-resistant biological fungicide special for ginsengs/Chinese yams/peanuts and a preparation method thereof. The compound continuous-cropping-resistant biological fungicide is prepared from sheep manure, short and small bacillus pumilus, bacillus amyloliquefaciens liquid, bacillus sphaericus liquid, bacillus licheniformis liquid, paecilomyces fumosoroseus liquid, penicillium oxalicum liquid, streptomyces hygroscopicus liquid, streptomyces griseochromogenes liquid and an auxiliary matrix. The preparation method comprises the steps that 1, the bacterial liquids are prepared respectively and are mixed evenly; 2, main and auxiliary matrixes are evenly mixed, and then drying is performed under the pressure of 30-50 DEG C. The biological fungicide is resistant to continuous cropping, fixes nitrogen, dissolves phosphorus, releases potassium, absorbs moisture, keeps soil humidity, promotes decomposition of soil organic matter, is bacteriostatic and insect-resistant, improves micropopulation in soil, improves the functions of a soil structure, does not pollute the environment and is free of toxicity and residues and safe to human.