Composition for improving stability of liquid alkaline protease and use method

The invention belongs to the technical field of protease, and particularly relates to a composition for improving stability of liquid alkaline protease and a using method thereof.The composition comprises 50%-80% of propylene glycol, 10%-30% of sodium chloride, 5%-10% of sodium hydrogen sulfite, 2%-10% of Kathon and 2%-5% of 4-formylphenylboronic acid, and the most stable pH is 5-6 when the composition is used. The composition provided by the invention can effectively improve the stability of a liquid protease preparation, so that the liquid protease can still keep the enzyme activity of 90% or more after being stored for 1 month at 40 DEG C, and the stability is superior to that of a commercially available protease stabilizer product; after the composition is added, the stability of the protease diluent can be remarkably improved, the storage life of the liquid protease can be effectively prolonged, and popularization and application of the liquid protease are facilitated.