Composite function resin as well as preparation method and application thereof

The invention discloses composite function resin, and belongs to the field of resin. The composite functional resin has a basic structure shown as a formula (I) and/or a formula (II), wherein the AX is a quaternary ammonium group. By aiming at the problems that the existing resin has poor anti-interference capability during sterilization, and the capability of removing soluble organic matters in the water and sterilizing byproduct precursors and poor ability of negative ions such as nitrate radical, sulfate radical, phosphate radical and arsenate radical, the invention provides the composite function resin. The composite function resin simultaneously has the capability of effectively eliminating soluble organic matter in the water and sterilizing the byproduct precursors and negative ionssuch as nitrate radical, sulfate radical, phosphate radical and arsenate radical, and has the advantages of efficient sterilization capability and anti-interference capability. The invention providesa preparation method of th