Molten　salts　electrolysis　method　to　prepare　Al-RE　alloys　has　attracted　increasing　attention　recently.　CaCl2　and　Na3AlF6　were　the　most　often　used　melts　for　this　purpose.　In　this　work,　Al-Sc　alloys　prepared　by　electrolytic　deposition　process　in　both　CaCl2　and　Na3AlF6　melts　were　investigated,　respectively.　It　was　found　that　Sc　distributes　almost　uniformly　and　Sc　contents　increase　with　increasing　current　intensity　in　both　melts.　Current　efficiency　was　measured　for　comparison　among　various　current　densities　applied.　The　alloy　products　were　analyzed　using　XRD　and　SEM,　where　the　formation　behaviors　of　Al-Sc　intermetallics　were　investigated　in　details.　The　experimental　and　theoretical　results　demonstrate　that　Al3Sc　and　Al0.968Sc0.032　are　the　major　precipitates　in　the　Al-Sc　alloys　prepared　by　molten　electrolysis.　The　results　are　useful　for　selection　and　optimization　of　the　molten　salts　compositions　and　the　parameters　of　electrolysis　operation.