Method of preparing heat-proof xylanase, heat-proof beta-xylosidase or heat-proof beta-glucosidase

The invention discloses a making method of heat-proof xylanase, heat-proof beta-xylosidase or heat-proof beta-glucosidase, which comprises the following steps: adopting agricultural waste as carbon source; fermenting Paecilomyces thermophila J18 at 40-60 deg.c to obtain the ferment liquid with heat-proof xylanase, heat-proof beta-xylosidase or heat-proof beta-glucosidase; purifying; obtaining electrophoretic grade product.