Preparation method of easy-to-disperse pigment

The invention discloses a preparation method of an easily dispersible pigment, and relates to the technical field of organic pigments. The preparation method comprises the following steps: S1, adding a sodium hydroxide solution into a closed container with stirring and temperature control functions, starting stirring and temperature control, controlling the temperature of the sodium hydroxide solution to be 40-60 DEG C, adding organic phosphoric acid into the closed container, and stirring and reacting for 10-30 minutes under the condition of heat preservation to obtain a reaction solution A; s2, extracting the reaction liquid A for three times by using ethyl acetate to obtain extract liquor, and distilling the extract liquor to remove the ethyl acetate to obtain a reactant B; the high-molecular resin particles and the inorganic dye are forcibly mixed through a high-speed stirring process, so that the inorganic dye in the prepared master batch is uniformly dispersed, and meanwhile, the prepared master batch i