According　to　the　characteristics　of　the　complexity　and　variability,　the　risk　evaluation　of　earthquake　secondary　geological　hazards　is　proposed　based　on　GA,　PSO　and　K-CV　optimized　the　parameters　of　the　support　vector　classification.　The　method　not　only　has　the　excellent　characteristics　of　solving　speed　fast　and　describing　nonlinear　relationship　easily　of　SVC,　but　also　has　the　characteristic　of　fast　optimization.　GA,　PSO　and　K-CV　are　used　to　search　the　optimum　parameters　of　SVC,　and　the　optimal　model　is　applied　to　evaluate　the　risk　of　earthquake　secondary　geological　hazards　of　Wenchuan　Ms　8.0　earthquake.　The　results　show　that　the　method　is　reasonable　and　feasible.　Moreover,　it　can　provide　the　reference　for　the　evaluation　and　prevention　of　geological　hazards,　and　reconstruction　after　earthquake.　©　2014　ejge.