A series of chromium-iron spinel black matte glazes were prepared at 1 200 ℃ by adjusting the ratio of chromium to iron in chromium-iron spinel. The influences of black pigments prepared under different iron-chromium ratios on the coloration of matte glazes and the coloration mechanism were studied. The results show that when the pigment formula is m(Fe3O4)∶m(Cr2O3)=80∶20 (mass ratio), the glaze is the darkest, and its L*, a* and b* values are 15.90, -0.75 and 0.94, respectively. The n(Fe3+)∶n(Fe2+)=60.38∶39.62 (molar ratio) in the glaze, the content of Fe2+ is the highest, which is conducive to the appearance of black. The glaze is black because of the superposition of the optical effects of Fe3+, Fe2+ and Cr3+ under visible light. The four-coordinated Fe3+ is brownish red, the six-coordinated Cr3+ is green, and the six-coordinated Fe2+ is green. The superposition of the three colors can absorb all the wavelengths of visible light and make the glaze appear black. The main crystal phase in the black matte glaze is wollastonite phase. Wollastonite grains are randomly distributed in the glaze, and the grain size is within 10 μm, which produces a matting effect and makes the glaze produce a soft matte texture.