The invention discloses a preparation method of a bionic super-hydrophobic composite organic pigment. The preparation method comprises the following steps: activating meerschaum by an acid, using meerschaum to adsorb an organic pigment, and using organic silane to modify meerschaum. According to the preparation method, ethyl n-silicate is used to form a rough outer surface on the surface of an organic composite pigment taking modified meerschaum as the carrier; the thickness of the rough surface can be controlled by controlling the concentration of ethyl n-silicate; at the same time, a silanization agent is added to modified the composite pigment so as to form alkyl groups on the outer surface of the composite pigment, the surface energy of the composite pigment is reduced, and the meerschaum composite organic pigment has a super-hydrophobic property therefore. The synthesis equipment is simple, no pollution is generated, and the investment is little. The obtained super-hydrophobic composite organic pigment has a bright color and luster, also has a super-hydrophobic and self-cleaning function, does not dissolve in liquid acid or alkali, and has a strong performance on resisting organic solvents, heat, and UV aging.