For the purpose of accelerating the practical application of NaSICON NaZr2(PO4)3 powders, a solid-state reaction method at low- temperature was developed to prepare NaZr2(PO4)3 powders using ZrOCl2?8H2O and NaH2PO4?2H2O as raw materials. The influence of phosphate content on the synthesis of NaZr2(PO4)3 powders was investigated by XRD, SEM and Raman techniques. The results show that excess amount of phosphate is beneficial to obtain the pure phase of NaZr2(PO4)3. In addition, the as-prepared powders with average particle size of 1 μm show uniform size and good dispersion when the mole ratio of ZrOCl2?8H2O to NaH2PO4?2H2O is 2∶5.4. The occurrence of solid-state reaction during grinding process is found to play an essential role in the preparation of NaZr2(PO4)3 powders. On the one hand, the amorphous NaZr2(PO4)3 produced by solid-state reaction contributes to the formation of crystalline NaZr2(PO4)3. On the other hand, the in-situ generation of NaCl provides favorable liquid environment for the crystal growth. Furthermore, this work develop a facile and effective route for the mass production of NaZr2(PO4)3 powders.