The invention discloses a preparation method of high energy-saving and environment-friendly type phthalocyanine green pigment in the field of preparation of organic pigment. The method is characterized by comprising the following specific steps: S1, copper phthalocyanine is pre-dissolved, 6-8 g of a catalyst is added, and the solution is heated to 100-120 DEG C for a chlorine introduction reaction; S2, a crude phthalocyanine green product is obtained after filtering; S3, then 5-7 g of a surfactant is added, stirring is performed sufficiently, an organic medium is removed by steam distillation,and a fine phthalocyanine green product is obtained after filtering and drying; S4, the fine phthalocyanine green product is mixed with 400-600 ml of water-based resin, the mixture is uniformly stirred, and the phthalocyanine green pigment is prepared. Power consumption for temperature increasing is reduced by increasing atmospheric pressure and reducing reaction temperature, meanwhile, system viscosity can be reduced, sufficient color development of the pigment is realized, color and luster are improved, acidic sewage is not discharged in the preparation process, and environmental pollutionis avoided.