On　May　12,　2008,　an　earthquake　with　the　magnitude　of　Ms=8.0　occurred　in　Wenchuan　County,　Sichuan　Province.　Many　Buildings　in　very　severely　affected　areas　suffered　serious　damage　or　even　collapsed,　causing　heavy　casualties　and　huge　economic　loss.　This　paper　introduced　the　damage　phenomena　of　R.C　frame　buildings　in　severe　affected　areas.　The　damage　states　of　the　buildings　are　characterized　by　total　collapse,　extensive　sway　of　building,　locally　continuous　collapse　of　building,　partial　story　collapse,　Partial　collapse　of　building　and　extensive　lateral　displacement　in　bottom　story.　The　damage　phenomena　of　beams　and　columns　are　classified　into　shear　failure,　shear-compression　failure,　flexure-shear　failure,　compression-buckling　failure,　plastic　hinge　failure　of　columns,　shear　failure　of　beams.　The　main　reasons　of　damage　of　R.C　frame　structures　were　preliminary　analyzed　on　the　aspect　of　structural　plan　and　facade　layout,　structural　system　and　structural　element.