Abstract: The new methods for nanocapsules preparation are introduced in this paper，including emulsion polymerization，interfacial polymerization，cohesion phase separation，double emulsion evaporation technique，inorganic chemical plating membrane，alternating adsorption of poly-electrolytes. The structure and physicochemical performance of nanocapsules，such as particle size，rate of capsulation，Zeta potential, heat-sensitivity and pH-sensitivity are also reviewed. The development trends for nanocapsules are presented.