Production method of dry-mixed mortar additive

The invention relates to a production method of a dry-mixed mortar additive. The production method of the dry-mixed mortar additive comprises the steps of hydrolysis reaction, distillation, steam stripping, polymerization reaction, devolatilization and dispersive mixing. The production method of the dry-mixed mortar additive is simple and convenient in technological process and easy to operate and control, raw materials of the dry-mixed mortar additive are organic hazardous chemicals and solid waste, harmless treatment and resource utilization are realized, cost is low, and environmental protection is realized. The dry-mixed mortar additive obtained by adopting the production method provided by the invention has the advantages that water retaining capacity and thickness accord with national standard requirements, strength is more than or equal to 30% higher than the standard requirement, and the strength of the dry-mixed mortar additive is more than or equal to 25% higher than the strength of an existing mortar additive.