NOVELTY - Laccase enzyme solution and powder laccase are produced by performing steam sterilization of 20% mass volume concentration of potato juice, 2% mass volume concentration of glucose, 2% mass volume concentration of agar, 0.3% mass volume concentration of monopotassium phosphate (KH2PO4), and 0.15% mass volume concentration of magnesium sulfate heptahydrate (MgSO4.7H2O) at 121 degrees C for 20 minutes to obtain potato dextrose agar (PDA) solid medium, culturing at 30 degrees C for 7 days, cutting, shaking, fermenting, adding 2-6 times by weight of water, and extracting at 25-40 degrees C for 4-6 hours.    USE - Production of laccase enzyme solution and powder laccase for paper making, biological bleaching, textile printing and dyeing, sewage treatment, and wastewater processing.    ADVANTAGE - Production process is low-cost, reduces environmental pollution, and has shortened fermentation period, increased laccase production efficiency, and product has high activity and good stability.    DETAILED DESCRIPTION - Laccase enzyme solution and powder laccase are produced by performing steam sterilization of 20% mass volume concentration of potato juice, 2% mass volume concentration of glucose, 2% mass volume concentration of agar, 0.3% mass volume concentration of monopotassium phosphate (KH2PO4), and 0.15% mass volume concentration of magnesium sulfate heptahydrate (MgSO4.7H2O) at 121 degrees C for 20 minutes to obtain potato dextrose agar (PDA) solid medium, performing steam sterilization of 20% mass volume concentration of potato juice, 2% mass volume concentration of glucose, and 0.2% mass volume concentration of ammonium tartrate at 121 degrees C for 20 minutes to obtain seed medium, taking inclined strain on PDA solid medium point of access mycelium, culturing at 30 degrees C for 7 days, cutting into 3 blocks with strain diameter size of 6 mm containing 50 ml seed medium in 250 ml triangular bottle, adding 10 tablets of glass bead, placing into shaker at 200 rpm and 30 degrees C, culturing for 2-4 days to obtain fermentation seed liquid, performing steam sterilization of 30-40 mass% Chinese medicine slag, 10 mass% soybean meal, 10 mass% wheat bran, 40-50 mass% water, 0.5 mass% calcium chloride (CaCl2), 0.5 mass% (KH2PO4), and 0.2 mass% MgSO4.7H2O at 1.01 MPa and 121 degrees C for 20 minutes to obtain enzyme production medium, fermenting 6-10% inoculum at 24-30 degrees C for 6-9 days to obtain fermented culture, adding 2-6 times by weight of water, and extracting at 25-40 degrees C for 4-6 hours.