Method for enhancing stability of preserved neutral protease

The invention belongs to the technical field of enzyme treatment, and particularly relates to a method for enhancing the stability of preserved neutral protease. The method comprises the steps that a stabilizer-anhydrous calcium chloride, sorbitol and potassium sorbate are added into the neutral protease, and then the neutral protease is preserved at a certain pH value and temperature. By adopting the method, the stability of the neutral protease can be significantly enhanced. According to the method, the stabilizer-anhydrous calcium chloride, sorbitol and potassium sorbate are added into the neutral protease to enhance the stability of the neutral protease, the pH value of the neutral protease into which the stabilizer is added is regulated, then the neutral protease mixed material is preserved in the environment at the temperature of 25 DEG C or below, and the residual rate of enzyme activity of the neutral protease is 90% or above.