The invention relates to the technical field of inorganic chemical application, in particular to a preparation method of a CPF/ZnO nano-composite catalytic material. The preparation method of the CPF/ZnO nano-composite catalytic material comprises the steps as follows: step 1, preparing nano zinc oxide; step 2, firstly, preparing a precursor PF/ZnO, and further optimizing the precursor PF/ZnO through thermal conversion to obtain the CPF/ZnO nano-composite catalyst. The spectrum response range of ZnO is greatly broadened through introduction of CPF, so that the ZnO can absorb whole light wavesof an ultraviolet-visible area. Under the natural light condition, the CPF/ZnO nano-composite catalyst can decolorize an MB solution within 10 min, and the decolorization rate of a dye solution can still be kept at 80% or above after the catalyst is reused 3 times. Compared with pure ZnO, the CPF/ZnO nano-composite catalyst has the characteristics of being high in catalytic activity, good in stability, free of energy consumption, easy to separate, free of secondary pollution and the like.