According　to　the　complexity　of　seismic　disaster-pregnant　environment,　the　randomness　and　fuzziness　of　seismic　hazard,　regional　seismic　environment　mutation　analysis　model　was　established　based　on　the　cusp　catastrophe　model,　on　the　basis　of　the　analysis　of　regional　seismic　environmental　impact　factors　and　mutant　behavior.　The　mutation　hierarchy　system　of　regional　seismic　hazard　was　built,　and　grading　standard　for　regional　seismic　hazard　assessment　was　divided.　The　catastrophe　method　for　regional　seismic　hazard　assessment　was　proposed　based　on　the　classic　mutation　theory　and　its　promotion　in　the　form.　Visualization　of　regional　seismic　hazard　was　achieved　combined　with　GIS　spatial　analysis　techniques.　Firstly,　the　bottom　evaluating　indicators　were　assigned　values　using　GIS　technology,　and　standardized.　According　to　the　characteristics　of　index　system,　the　corresponding　mutation　model　was　identified,　and　the　total　value　of　mutation　of　regional　seismic　hazard　was　calculated　by　recursion.　The　seismic　hazard　classification　was　obtained　comparing　with　multi-criteria　hazard　evaluation　level.　Secondly,　the　assessment　map　of　potential　seismic　hazard　was　drafted　using　GIS,　then　the　regional　seismic　hazard　assessment　was　achieved.　Finally,　through　the　example　calculation　and　analysis,　the　feasibility　and　rationality　of　the　method　was　verified.　The　evaluation　results　can　provide　a　theoretical　basis　for　the　potential　seismic　hazard　analysis　and　seismic　hazard　assessment.