The (1-x)(Mg0.95Zn0.05)TiO3-x(La0.44Sr0.33)TiO3(MZLST) system microwave ceramics were prepared by conventional solid state reaction process.The effects of (La0.44Sr0.33)TiO3 doped amount on the sintering characteristics,phase composition,microstructure and microwave dielectric properties of MZLST ceramics were systemically investigated. The results showed that, with a small mount of (La0.44Sr0.33)TiO3 addition,the prepared MZLST ceramics had the mixed phases of (Mg0.95Zn0.05)TiO3 and (La0.44Sr0.33)TiO3 as the main phases,and the intensity of a minor phase (Mg0.95Zn0.05)Ti2O5 increased with the sintering temperature increase.Forx=0.10,the MZLST ceramics exhibited optimalve microwave dielectric properties of εr=22.17，Q·f=48 471 GHz (6.72 GHz)and τf=-7.99×10-6/℃ sintered at 1 285 ℃ for 2 h.