Nano-particles of CaZrO3 were successfully synthesized at 850°C using the molten-salt method, and the effects of processing parameters, such as temperature, holding time and amount of salt on the crystallization of CaZrO3 were investigated. CaCO3, Na2CO3, NaCl and nano-ZrO2 were used as starting materials. On heating, Na2CO3-NaCl molten eutectic salt provided a liquid medium for reaction of CaCO3 and ZrO2 to form CaZrO3. The results demonstrated that CaZrO3 started to form at about 750°C and that, after the temperature was increased to 1000°C, the amounts of CaZrO3 in the resultant powders increased with a concomitant decrease in CaCO3 and ZrO2 contents. After washing with hot- distilled water, the samples heated for 4h at 850°C were single- phase CaZrO3 with 90–95nm particle size. Furthermore, the synthesized CaZrO3 particles retained the size and morphology of the ZrO2 powders, which indicated that a template formation mechanism dominated the formation of CaZrO3 by molten-salt method.