A method for preparing a pre-mixed foundation material with a negligible chromatic aberration includes steps of: (1) processing all raw material powder of the pre-mixed foundation material with uniform surface treatments, so as to homogenize surface properties of the raw material powder； (2) after the surface treatments, thoroughly stirring the raw material powder with a high speed for obtaining the pre-mixed foundation material； and after mixing with a high-speed mixer, post-treating the pre-mixed foundation material by a jet milling method, so as to evenly disperse powder of the pre-mixed foundation material； (3) measuring the chromatic aberration； (4) adjusting a color； and (5) monitoring the chromatic aberration, for controlling the chromatic aberration ΔEcmc<；0.8. According to the present invention, with help of instruments, the chromatic aberration is digitally and quantitatively measured； varied powder is processed with the uniform surface treatments, so as to enable the uniform surface properties.
