The La2O3B2O3-ZnO(LBZ) glass deped CaO-La2O3-TiO2(CLT) microwave dielectric ceramics of perovskite system were synthesized by the traditional solidstate reaction method. The effects of LBZ glass doping on the sintering character and electric properties of the samples were studied by using XRD,SEM and the microwave dielectric properties measurements.The results show that adding LBZ in the CLT ceramic will effectively promote the sintering,andcan significantly reduce the sintering temperature from 1 350 ℃ to lower than 950 ℃ while maintain good dielectric properties.When the mass fraction of LBZ reaches to 3%, and the sample pellets were sintered at temperatures at around 950 ℃ for 4 h,the sample shows the best microwave performances as follows:εr=103.12,Q×f=8 826 GHz(f=3.03 GHz),τf=87.52×10-6/℃.