The influences of BaCu(B2O5) (BCB) addition on sintering,microstructure and microwave dielectric properties of Li2MgTi3O8 ceramics were investigated using X-ray diffractometry,scanning electron microscopy and microwave dielectric measurements.The experimental results show that a small amount of BaCu(B2O5) addition can effectively reduce the sintering temperature to 900 ℃,and induce only a limited degradation of the microwave dielectric properties.Typically,the best microwave dielectric properties of εr=24.5,Q×f=24 622 GHz,τt=4.2×10-6 ℃-1 are obtained for 1.0％ BCB-doped Li2MgTi3O8 ceramics sintered at 900 ℃ for 3 h.The BCB-doped Li2MgTi3O8 ceramics can be compatible with Ag electrode,which may be a strong candidate for low temperature co-fired ceramics applications.