Production method of corn starch AKD sizing agent special for papermaking

The invention provides a production method of a corn starch AKD sizing agent special for papermaking, and relates to the technical field of sizing agents for papermaking. The production method of thespecial corn starch AKD sizing agent for papermaking comprises the following steps: S1, preparing starch milk with the concentration of 20-40%, adding the starch milk into a reaction tank, adding alkali liquor to adjust the pH value of the starch milk, and adding an emulsifier to carry out primary denaturation reaction; and S2, adding alkali liquor into the reaction tank to adjust the pH value ofthe starch milk, stabilizing, adding 10-50% of an oxidant according to a specified amount, adjusting the temperature to 20-50 DEG C, carrying out a reaction, and after the reaction is carried out for1-8 h, quantitatively adding a reducing agent to finish the reaction. According to the invention, the corn composite modified starch is used for replacing cassava oxidized starch for gelatinization; in the whole reaction system