In　strengthening　engineering　of　reinforced　concrete　structures,　it　is　difficult　to　vibrate　concrete　and　guarantee　the　quality　of　construction　if　normal　concrete　is　used.　This　is　because　the　enlarged　cross　section　of　concrete　is　too　small　and　the　reinforcement　is　too　dense.　Self-compacting　concrete　(SCC)　has　high　filling　ability　and　good　segregation　resistance,　which　can　compact　into　every　corner　of　a　complicated　formwork,　purely　by　means　of　its　own　weight　and　without　the　need　for　vibrating　compaction.　At　the　same　time,　the　hardened　SCC　possesses　fine　mechanical　performance　and　fine　durability.　So,　the　difficulty　of　vibrating　casting　concrete　in　strengthening　engineering　can　be　solved　by　using　SCC.　The　study　on　the　application　of　SCC　in　strengthening　buildings　and　industrial　workshops　is　presented　in　this　paper.　The　optimization　of　mixture　proportions　of　SCC　and　its　construction　technique　such　as　the　production,　construction　and　quality　control　of　SCC　are　expatiated　in　detail.　The　SCC　enables　the　construction　of　strengthening　engineering　to　be　convenient,　and　the　engineering　quality　to　be　improved.　Compared　with　other　strengthening　schemes,　the　construction　cost　also　can　be　reduced　obviously.　Using　SCC　in　strengthening　engineering　can　produce　good　technology　and　economy　benefit.