Nb3Al　nanoparticles　were　directly　synthesized　by　metallothermic　reduction　process　in　the　molten　salts　with　mNbCl(5)-nAlCl(3)　powders　as　raw　materials　and　sodium　as　reducing　reagent.　The　effects　of　different　feeding　material　orders,　soaking　time,　Nb　content　in　raw　materials,　and　3NbCl(5)-AlCl3　content　in　molten　salts　on　the　obtained　Nb3Al　powder　were　discussed.　The　as-prepared　samples　were　characterized　by　X-ray　diffraction　(XRD),　scanning　electron　microscopy　(SEM),　and　transmission　electron　microscopy　(TEM).　It　is　found　that　the　only　phase　Nb3Al　nanoparticles　are　obtained　by　controlling　the　variation　of　the　feeding　material　orders,　soaking　time,　and　Nb　content　in　raw　materials.　And　the　morphologies　of　as-prepared　nanoparticles　change　owning　to　different　3NbCl(5)-AlCl3　contents　in　molten　salts.