Abstract: BaFe₁₂O₁₉/SiO₂-B₂O₃-K₂O microcrystallite glass ceramics were prepared by citrate sol-gel process. The dielectric constan tand permeability dispersion were investigated in 100MHz ～ 6. 0 GH zrange. It was discovered that the synthesis temperature of BaFe₁₂O₁₉/SiO₂-B₂O₃-K₂O microcrystallite glass ceramics is about 850℃ and the condition such as Ba/Fe had a close effect on the syn thesis of BaFe₁₂O₁₉/SiO₂-B₂O₃-K₂O. It also showed that the dielectric exhib it salmo stnovariation with measuring frequency increasing. The real part of permeability decreases as the measuring frequency increasing.