Using Zr0.8Sn0.2TiO4 (ZST) as the main components，0.25% of WO3 and 1% of ZnO as the modifiers, and applying the traditional solid phase method process, the cooling rate of ZST has been studied at the sintering period. The measurement of the linear shrinkage of the sample showed that the best sintering temperature was at 1 340 ℃. The effect of different cooling rate on the microwave properties of ZST has been studied in the cooling process of 1 340 1 000 ℃. The densities of the sample have been measured at different cooling rates. The results showed that the sample had the maximum density of 5.05 g/cm3 at the cooling rate of 10 ℃/h. The crystal structure and microwave dielectric properties of the sample have been analyzed by X ray diffraction analyzer (XRD) and the vector network analyzer. The experimental results showed that the sintering temperature of ZST could bereduced to 1 340 ℃ by adding small amount of WO3 and ZnO and the slowdown of the cooling rate could change the lattice size of ZST ceramic so that the lattice volume was reduced. The optimal microwave property can be obtained when the sintering temperature was at 1 340 ℃ and the cooling rate was at 10 ℃/h. The dielectric constant is 36.88,Q×f is 35 000 GHz (7.8 GHz).