In this work, we propose a method of applying a surface coating to the powder surface of materials that dissolve incongruently in aqueous solutions. The hydrothermal synthesized BaTiO3 particles are coated by sol-precipitation methods. Next, a typical CSP is used to obtain a dense BaTiO3 ceramics. This work compares the densities and the dielectric properties of a surface-coating-assisted CSP. The main objective of this work is to explore the coating method to enhance the BaTiO3 ceramic density by using the CSP. The results show that this coating method has the potential to extend the CSP to materials that undergo incongruent dissolution.