A copper complex based on dipyridine piperazine organic ligand and Anderson type polyacid, and a synthesis method and application thereof. The molecular formula of the complex is one selected from the followings: H[Cu2L1Cr(OH 6Mo6O18 (mu2-OH)2].4H2O, and [Cu2L2Cr(OH)6MoVI5MoVO18 (H2O)4].4H2O. The method is as below: adding copper salt, Anderson type polyacid, and dipyridine piperazine organic ligand into deionized water, stirring at room temperature, adjusting the pH value, insulating under hydrothermal conditions in a high-pressure reaction kettle, cooling to room temperature to produce massive dark green crystals, cleaning and drying, so as to prepare the copper complex based on dipyridine piperazine organic ligand and Anderson type polyacid. The synthetic method of the complex is simple, easy for crystallization and high in synthesis yield, the complex has strong affinity and good photocatalytic degradation effect on water-soluble pollutants, and can be used as photocatalytic materials.