To solve the problem of nanoparticles’ aggregation,the nano Ag/liquid crystals hybrid composite were prepared via in-situ synthesis method by thermo-decomposing Ag2C2O4 in thermotropic liquid crystals.The obtained composite of nano Ag/liquid crystals were characterized with X-ray diffraction (XRD),transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy(XPS).The results showed that the particle sizes of Ag were less than 20nm,which were mono-dispersed in liquid crystal, and no aggregation was observed.