According　to　the　characteristics　of　the　complexity　and　variability　of　factors,　a　risk　degree　of　earthquake　secondary　geological　hazards　evaluation　method　was　proposed　based　on　GA,　PSO　and　K-CV　optimized　parameters　of　support　vector　classification.　The　method　not　only　has　the　excellent　characteristics　of　fast　solving　speed　and　describing　nonlinear　relationship　of　SVC　easily,　but　also　has　the　characteristic　of　fast　optimization.　GA,　PSO　and　K-CV　were　used　to　search　the　optimum　parameters　of　SVC,　then　the　optimal　model　was　applied　to　evaluate　the　risk　degree　of　earthquake　secondary　geological　hazards.　The　results　show　that　the　method　is　reasonable　and　feasible.