The　infrastructure,　traffic,　and　driving　environment　at　interchanges　are　considerably　more　complicated　than　those　in　basic　freeway　segments;　interchanges　are　the　bottleneck　segments　of　freeways　in　terms　of　safety　and　efficiency.　Although　there　has　been　a　series　of　achievements　in　terms　of　safety　evaluation　of　interchanges,　issues　remain　between　theoretical　systems　and　practical　applications.　It　is　necessary　to　review　the　current　literatures　to　lay　the　foundation　for　future　research.　This　paper　summarizes　the　framework　of　all　researches　on　interchange　safety　evaluation.　The　evaluation　works　are　based　on　three　theories-ergonomic　theory,　traffic　conflict　theory,　and　consistent　operating　speed　theory.　The　main　evaluation　methods　are　the　crash　statistical　method　and　analytic　hierarchy　process　method.　For　evaluation　of　the　theory,　ergonomic　theory　can　be　widely　used　to　evaluate　the　safety　of　the　mainline　and　the　ramp.　This　accurately　detects　risky　sites　and　segments;　however,　the　tested　vehicle　types　and　sample　sizes　should　be　determined　to　improve　the　validity　of　the　index　results.　Traffic　conflict　theory　is　applicable　for　assessing　the　mainline　areas　with　obvious　traffic　conflicts,　but　the　impact　of　road　conditions　on　safety　is　not　considered.　The　evaluation　index　and　the　corresponding　thresholds　under　more　forms　of　diverging　and　merging　should　be　studied,　respectively.　Consistent　operating　speed　theory　is　relatively　mature　to　evaluate　the　safety　condition　of　basic　segments　along　freeways;　however,　the　segment　divisions　and　prediction　models　of　operating　speed　on　mainlines　and　ramps　should　be　further　optimized.　In　terms　of　the　evaluation　methods,　the　results　of　the　crash　statistical　method　are　objective　and　reliable,　but　data　collection　and　data　sharing　are　difficult.　The　analytic　hierarchy　process　method　can　determine　the　key　factors　for　safety　evaluation,　but　the　results　are　partially　subjective.　Both　evaluation　methods　have　limitations.　For　further　research,　the　safety　evaluation　for　interchanges　should　be　developed　around　both　mainline　and　ramp　systems,　and　the　evaluation　objects　should　consist　of　the　diverging　influence　area,　merging　influence　area,　and　the　joint　area.　It　is　suggested　that　further　research　focus　on　human-factor　engineering　theory,　and　thus　the　cost-efficiency　could　be　determined　to　establish　a　safe　driving　and　operation　environment　for　interchanges　in　line　with　ergonomics.　©　2020,　Editorial　Department　of　China　Journal　of　Highway　and　Transport.　All　right　reserved.