The invention provides a specific compound enzyme preparation for hard biscuit. The compound enzyme preparation comprises the following components in percentage by weight: 10 to 20 percent of neutral protease, 6 to 12 percent of papain, 6 to 10 percent of hemicellulase, 2 to 4 percent of bacterium alpha amylase, 1 to 4 percent of fungus alpha amylase, and 56 to 69 percent of glucosum anhydricum. The specific compound enzyme preparation has the following technical effects that 1) the preparation can be used for replacing chemical additive sodium pyrosulfite by 100 percent, so that the adverse effect by using the sodium pyrosulfite can be eliminated, and the produced biscuit is healthier; 2) the quality of the biscuit can be remarkably promoted, and the produced biscuit has the characteristics of plump biscuit body, uniform color, golden bright surface, crisp taste, good dissolving property in the mouth, rich natural baking flavor and the like; 3) when the biscuit is produced, the dough water addition can be reduced, and the biscuit baking time can be shortened, so that the production energy consumption can be reduced, and better energy-saving and environmental friendliness are brought; and 4) the preparation has simple production process, convenience for use, and great practical application value.