As　high-temperature　heat　transfer　medium　and　thermal　energy　storage　material,　molten　salts　are　widely　applied　in　concentrating　solar　power　(CSP)　plants　and　molten　salt　reactors　(MSR).　The　molten　salt　corrosion　is　a　crucial　influence　factor　for　the　system　safety　operation.　Different　influence　factors　such　as　temperature,　impurity,　alloy　composition,　gas　atmosphere,　nanofluids　and　flow　state　on　molten　salt　corrosion　are　comparatively　summarized　in　this　work.　Meanwhile,　the　corrosion　mechanisms　of　nitrate,　carbonate,　chloride　and　fluoride　salts　are　emphatically　reviewed.　Furthermore,　the　anti-corrosion　strategies　of　metallic　materials　to　molten　salt　are　presented.　Finally,　the　future　research　directions　of　molten　salt　corrosion　characteristics　are　proposed.　This　work　could　provide　practical　guidance　for　the　application　selection　of　metal　materials　in　the　CSP　and　MSR　system.