Due　to　the　complexity　of　the　construction　environment　and　retrofitting　methods,　it　is　difficult　to　achieve　the　expected　retrofitting　effect.　Therefore,　effective　seismic　retrofitting　training　is　a　necessary　way　to　ensure　retrofitting　workers　acquire　enough　professional　knowledge,　skills　and　safe　behaviors,　which　are　critical　to　retrofitting.　Mixed　reality　has　huge　potential　in　construction　training.　This　paper　conducts　a　fuzzy　comprehensive　evaluation　of　the　MR　seismic　retrofitting　training　system　to　research　the　potential　of　MR　in　training.　The　purpose　of　this　research　was　to　provide　scientific　guidance　and　reference　for　the　development,　improvement　and　selection　of　MR　training　systems　in　the　future.　In　this　research,　the　evaluation　indicators　of　the　MR　training　system　were　firstly　analyzed.　Next,　the　weight　of　each　evaluation　indicator　was　calculated　by　the　judgment　matrix.　Then,　the　evaluation　model　was　established　based　on　the　qualitative-quantitative　transformation　principle　of　indicators.　Finally,　the　results　of　the　MR　seismic　retrofitting　training　system　are　obtained　by　combining　the　evaluation　model　with　the　membership　matrix.　The　evaluation　result　of　the　training　system　in　this　paper　is　excellent.