It　is　well　established　that　the　configuration　and　operation　of　variable　speed　air　source　heat　pumps　(VS　ASHPs)　can　significantly　influence　their　frosting　performance.　However,　there　is　currently　no　effective　method　to　conveniently　and　accurately　evaluate　the　frosting　suppression　performance　of　these　units.　This　paper　addresses　this　gap　by　proposing　a　novel　evaluation　method　based　on　a　frosting　suppression　map　for　VS　ASHPs.　Firstly,　an　experimental　setup　with　four　ASHP　units　and　developed　frosting　suppression　maps　is　described.　Second,　a　method　for　evaluating　the　frosting　suppression　performance　of　VS　ASHP　is　developed　based　on　the　map.　Thirdly,　a　comprehensive　evaluation　of　the　frosting　suppression　performance　of　the　experimental　unit　is　carried　out.　It　is　shown　that　the　beta　values　of　the　four　units　under　the　constitutive　configuration　were　0.74,　0.12,　0.21,　and　0.52,　and　the　frosting　suppression　performance　was　evaluated　as　Good,　Poor,　Fair,　and　Average,　respectively.　It　could　be　enhanced　and　improved　to　0.89　(Excellent),　0.24　(Fair),　0.64　(Good),　and　0.63　(Good)　after　applying　the　frosting　suppression　operation　method.　The　proposed　novel　frosting　suppression　evaluation　method　is　simple　and　easy　to　implement,　which　could　contribute　to　further　guiding　manufacturers　to　improve　the　frosting　suppression　performance　of　VS　ASHPs.