NOVELTY - Pollution-free organic fertilizer comprises (pts. wt.) dregs of edible fungus (50-70), weathered coal (5-20), urea (4-15), monoammonium phosphate (5-15), potassium chloride (4-10), trace element fertilizer (1-5), degradation agent (2-5), and curing agent (5-10). The degradation agent comprises potassium hydroxide and cobaltous chloride at weight ratio of 1:0.1-0.3. The curing agent comprises magnesium oxide and triglycidyl isocyanurate at weight ratio of 1:0.2-0.5. The trace element fertilizer comprises iron, zinc, molybdenum and boron at weight ratio of 1:0.2-1:0.2-0.5:0.1-0.5.    USE - Organic fertilizer used for grains, vegetables, melon and fruits, and other cash crops.    ADVANTAGE - The fertilizer is convenient to apply and saves manpower, generates humic acid chelate of trace elements which can be easily absorbed by the plant, and has increased utilization rate.    DETAILED DESCRIPTION - Pollution-free organic fertilizer comprises (pts. wt.) dregs of edible fungus (50-70, preferably 50-65); weathered coal (5-20, preferably 5-15); urea (4-15, preferably 4-10); monoammonium phosphate (5-15, preferably 5-12); potassium chloride (4-10, preferably 4-8); trace element fertilizer (1-5, preferably 1-4); degradation agent (2-5); and curing agent (5-10). The degradation agent comprises potassium hydroxide and cobaltous chloride at weight ratio of 1:0.1-0.3. The curing agent comprises 350-450-mesh magnesium oxide powder and triglycidyl isocyanurate at weight ratio of 1:0.2-0.5 (preferably 1:0.2-0.4). The trace element fertilizer comprises iron, zinc, molybdenum and boron at weight ratio of 1:0.2-1:0.2-0.5:0.1-0.5 (preferably 1:0.4-0.6:0.2-0.4:0.2-0.4). The organic fertilizer is prepared by cutting and grinding dregs of edible fungus, adding other components, mixing, degrading and curing, extruding and pelletizing, and polishing and shaping to obtain spherical particles. An INDEPENDENT CLAIM is included for preparation of organic fertilizer by:    (A) cutting and grinding dregs of edible fungus for 7-10 minutes until granular diameter of 0.5-1 mm; uniformly mixing fungus dregs, weathered coal, urea, monoammonium phosphate, potassium chloride, trace element fertilizer, degradation agent and curing agent; and degrading and curing for 12-24 (preferably 15-20) hours until water content of 15-20 wt.%; and    (B) extruding and pelletizing to obtain particles with granular diameter 2-4 mm, and polishing and shaping to obtain spherical particles with granular diameter of 2 plus minus 0.2 mm.