The invention relates to a preparation method of a high-effective photosensitive phthalocyanine solid material. In the method, a salt containing a metal ion M and a non-peripheral substituted carboxylphthalocyanine-metal complex HPc are used as raw materials, N,N-dimethylformamide is used as a solvent, and a mixed solution composed of organic acid and water is used as an additive, thus synthesizing the material through a solvothermal method. The high-effective photosensitive phthalocyanine solid material can be applied to the field of environment governance. The material has excellent photosensitive activity, is simple in preparation method and high in yield, is good in stability, and has extensive application prospect.