A series of tunable-luminescence MOF/CA, MOF/CA+RhB, MOF/CA+CV and MOF/CA+RhB+CV composite light-emitting materials were prepared by combining calcein (CA), rhodamine B (RhB), crystal violet (CV) with MOF using Cd as metal ion, isophthalic acid and benzimidazole as ligand by the one-step method at room temperature. The influence of the initial addition amount and ratio of dyes on the fluorescence properties of MOF/Dye composites was discussed. With the increase of CA amount, the characteristic fluorescence emission intensity of CA increased firstly and then decreased accompanied with red-shift. Although the position of the characteristic fluorescence emission wavelength of RhB or CV remained unchanged due to the unchanged addition amount, the characteristic fluorescence emission intensity of CA changed like CA. MOF/CA₃+RhB+CV composite with white light emission was further prepared by adjusting the molar ratio of dyes using MOF as a platform. Its chromaticity coordinate (0.335, 0.321) was close to the ideal white light coordinate (0.333, 0.333).