Tunable Ba0.6Sr0.4TiO3 (BST) thick films were fabricated by the screenprinting process.The twostep pressing method was introduced to the fabrication process to increase the density of the thick films. The influence of the twostep pressing method on the microstructure and dielectric properties of films was discussed. Compared with the BST thick films prepared with the conventional screenprinting process, the thick films pretreated by the twostep pressing method exhibited much lower porosity and better dielectric properties.Under the condition of 20 ℃ and 10 kHz,the moderate dielectric constant was 958, the low dielectric loss was 0.013 4,and the high tunability was 48.6% , figureofmerit was 36.3 (at 6 kV/mm) respectively.