NOVELTY - Preparation of D213 macroporous strong base acrylic cation exchange resin comprises preparing 370. 2 kg methyl, 21.8 kg divinylbenzene, 8 kg triallyl isocyanurate (TAIC), 120 kg isobutyl alcohol, and 4 kg azo; according to prepared water phase, uniformly stirring, adding mixed monomer to stirring machine; slowly raising temperature to 69 degrees C; keeping temperature at 70 degrees C; heating to 82 degrees C; raising temperature to 96 degrees C; washing white ball, drying, and sieving; adding amine, raising temperature, sampling measurement and control; and extracting mother liquid, washing and outfeeding.    USE - A process for the preparation of D213 macroporous strong base acrylic cation exchange resin.    DETAILED DESCRIPTION - Preparation of D213 macroporous strong base acrylic cation exchange resin comprises:    (A) preparing 370. 2 kg methyl, 21.8 kg divinylbenzene, 8 kg TAIC, 120 kg isobutyl alcohol, and 4 kg azo;    (B) according to prepared water phase, uniformly stirring, stopping stirring, adding mixed monomer to stirring machine, and adjusting rotary speed;    (C) slowly raising temperature to 69 degrees C, observing ball size;    (D) keeping temperature at 70 degrees C, heat preserving for 2 hours;    (E) heating to 82 degrees C within 0.5 hour, heat preserving for 3 hours;    (F) raising temperature to 96 degrees C for 1 hour, insulating for 5 hours;    (G) using hot water to wash white ball for several times until water is clear; pumping water, drying, and sieving for further use;    (H) preparing 400 kg white ball, 800 kg propane, and 900 kg glycol; adding white ball in clean reaction kettle, adding amine, alcohol stirring, raising temperature to 140 degrees C, insulating for 5 hours, raising temperature to 160 degrees C, insulating for 6 hours, raising temperature to 170 degrees C, insulating for 4 hours, raising temperature to 175 degrees C, insulating for 4 hours, sampling measurement and control at exchange of more than 4. 2 mmol/g; and    (I) extracting mother liquid, water washing and outfeeding.