The invention belongs to the technical field of ion exchange resin and relates to a method for preparing macroporous type highly-crosslinked acrylic acid ion exchange resin. The method includes a stepof adding softened water into a reaction kettle, adding industrial salt, stirring the mixture, adjusting the specific gravity and temperature, then adding hydroxyethyl cellulose, and heating and stirring the mixture to obtain a water phase; a step of adding acrylonitrile, methyl acrylate and triallyl isocyanurate into a burdening kettle; a step of adding benzoyl peroxide into divinylbenzene, adding the mixture after the mixture is stirred into the burdening kettle, adding toluene, and fully stirring the mixture to obtain an organic phase; a step of mixing the organic phase and the water phasein a mass ratio of 1:3.3-3.5; a step of heating and reacting the mixture, transferring the reaction solution to a stripper, performing filtration to remove filtrate completely, adding hot water, stirring the mixture, heating and reacting the mixture and performing hot-air drying; and a step of adding sulfuric acid, heating and reacting the mixture, cooling a reaction product, and adding water fordilution. The method is innovative in China and large-scale production has not been found in enterprises. The resin prepared by the method is simple in process, excellent in effect, environmentally friendly, and pollution-free and has a wide application prospect.