The research status of miniemulsion polymerization technology coated inorganic nano-particles at home and abroad were described.The characteristic of miniemulsion polymerization,the mechanism of miniemulsion polymerization coated inorganic nano-particles and the development trend for the future were simply introduced.The effect of sonic dispersion,the types and contents of surfactant,surface disposal,cosurfactant,polymerization temperature,monomer and initiator on miniemulsion polymerization coated inorganic nano-particles were analyzed.Equable separation of inorganic nano-particles,the small diameter and even distribution of inorganic nano-particles-monomer liquid dripping are the pivotal factor to coat inorganic nano-particles by miniemulsion polymerization.