The　safety　of　the　boiler　drum　was　evaluated　according　to　fuzzy　comprehensive　evaluation　theory.　The　Boiler　Drum　security　evaluation　system　was　set　up,　and　the　mathematical　model　of　the　boiler　drum　based　on　fuzzy　comprehensive　evaluation　was　established.　The　evaluation　vector　of　the　factors　by　using　fuzzy　statistical　method　or　fuzzy　language　algorithm　was　calculated.　The　grey　relative　analysis　was　used　to　ascertain　the　weight　of　each　factor.　Risk　matrix　method　and　level　parameters　were　combined　to　determine　the　security　level　of　the　boiler　drum.　The　safety　evaluation　program　of　boiler　drum　was　developed　by　using　Visual　Basic　software.　The　risk　grade　of　the　boiler　drum　in　a　city　has　been　evaluated　by　using　the　program.