The invention provides a method for improving the reaction property of a dissolving pulp board. The method comprises the following steps of adopting the dissolving pulp board with the thickness being 0.05cm to 0.50cm, and controlling the moisture content of the dissolving pulp board to be 2 percent to 10 percent for standby use; adopting cellulase for preparing a cellulase solution with the mass concentration being 5 percent to 10 percent, adopting strong acidic-weak basic salt for adjusting a pH value of the cellulase solution to be 4.5 to 5.5, and obtaining a cellulase solution for standby use; sequentially and uniformly spraying the cellulase solution for standby use and water on the processed dissolving pulp board, and preparing to react; putting the dissolving pulp board into a constant temperature and humidity room for reacting, wherein the temperature of the constant temperature and humidity room ranges from 40 to 60 DEG C, and the humidity of the constant temperature and humidity room is consistent to the moisture content of the sprayed dissolving pulp board. According to the method provided by the invention, the reaction property of the dissolving pulp board is improved, meanwhile, not only is the waste of water resource avoided, but also the energy consumption is reduced, and the method is lower in cost.