Modified adsorption resin with composite pore structure and preparation method thereof

The invention discloses a modified adsorption resin with a composite pore structure and a preparation method thereof. The modified adsorption resin comprises the following raw materials by mass: 36.3-55% of styrene, 7-39% of a cross-linking agent, 0.3-0.7% of an initiator, 19-53% of a pore forming agent and 0.8-2% of a dispersant. The preparation method comprises the following steps: preparing anoil phase and a water phase, pouring the oil phase into the water phase, allowing the oil phase to form liquid beads which suspend in the water phase, carrying out heating in stages to harden the liquid beads, pouring out liquid at an upper layer after the completion of the reaction, then carrying out filtration, and collecting resin beads; extracting the resin beads with petroleum ether, soakingthe extracted resin beads in methanol, carrying out filtering, repeatedly soaking with the resin beads in methanol, carrying out filtering to remove petroleum ether remaining in resin, and then carrying out flushing with deion