The rare earth doped alkaline-earth sulfides (RE-doped AES) are widely researched because their high color rendering index and superior optical performance characteristics. However, the AES are very instability when they are exposed to moisture or other atmospheric components, which results that the applications of phosphors have been limited seriously. Perovskite-type phosphor has excellent chemical stability and optical properties, indicating that it is the potential red phosphor in making white-LED. It is the key to improve the luminous efficiency of the phosphor. In the article, SiO2 is covered onto the surface of the phosphor particles via sol-gel method and PMMA is encapsulated onto the surface of the phosphor particles by deposition. Results of XRD、FT-IR、EDS and TEM show that SiO2 and PMMA are covered onto the surface of the phosphor particles successfully, forming a uniform layer of dense amorphous composite film. The PL intensity of sample decreased slightly when it coated with SiO2-PMMA. But the degree of decline is less than the sample coated with SiO2. The reason for that there is a good refractive index match between PMMA (1.49) and SiO2 (1.46), which decline the dispersion of light. PL emission intensity of the phosphor coated with SiO2-PMMA is kept at about 85.9% when the sample is soaked into water for 50 h, implying that the amorphous composite film has an effective on protecting the optical properties of the phosphor. Results demonstrate that water-resistance of red phosphor CaS:Eu,Sm is enhanced by forming an amorphous composite film onto the surface of the phosphor particles. Types of perovskite solid solution red phosphors are obtained by introducing Mg2+ ions or ions into CaTiO3 host, respectively. Seen from the SEM images, it can be well known that spherical particles appeared and size of the phosphor particles are uniformly distributed in the range of 600-800 nm when the concentration of Mg2+ ions is about 40 mol%. Reason for that the activation energy of the lattice is reduced due to introducing Mg2+ into CaTiO3 host lattice, leading to balancing melting and consumption rate of raw materials. Thus, the uniform particles are formed when the concentration of the Mg2+ ions is the optimal concentration. The PL emission intensity (617 nm) of phosphor Mg0.4Ca0.6TiO3:Eu3+ is 4.26 times that of CaTiO3:Eu3+, when the concentration of Mg2+ ions is 40 mol%. The optimal concentration for obtaining the strongest PL emission intensity of Ca(TiO3)1-x/2(AlO2)x:Eu3+ is about 20 mol% of ions. The PL emission intensity (617 nm) of phosphor Ca(TiO3)0.89(AlO2)0.22:Eu3+ is 4.19 and 3.08 times that of phosphor CaTiO3:Eu3+, monitoring at 398nm and 467nm, respectively. As a consequence, the PL emission intensity of phosphors can be enhanced by introducing and Mg2+ ions, showing that perovskite solid solution type red phosphor is one of the most promising red-emitting phosphors in making tricolor phosphor converted White-LEDs.