Dispersion　and　attenuation　characteristics　of　torsional　modes　of　ultrasonic　guided　wave　in　pipe　with　viscoelastic　coating　are　investigated.　Torsional　modes　dispersion　equation　of　the　pipe　with　viscoelastic　coating　is　analyzed　theoretically.　Propagation　characteristics　of　T(0,　1)　mode　at　different　frequencies　are　studied.　T(0,　1)　mode　in　the　frequency　range　of　0-0.8　kHz　is　suitable　for　defect　detection　in　pipe　with　viscoelastic　coatings　for　it　disperses　weakly　and　attenuates　low.　Whereas,　T(0,　1)　mode　in　the　frequency　range　above　0.8　MHz　disperses　and　attenuates　serious,　and　therefore　it　is　inappropriate　to　defect　detection.　In　the　experiments,　T(0,　l)　mode　at　low　frequencies　is　excited　by　16　thickness　shear　mode　piezoelectric　ceramics　in　a　steel　pipe　coated　with　epoxy　resins.　In　the　frequency　range　of　40-210　kHz,　tested　group　velocities　and　attenuations　of　T(0,　1)　mode　in　the　experiment　are　good　agreement　with　the　theoretical　results.　Results　show　that　attenuation　dispersion　curves　can　be　theoretical　guidance　of　mode　choice　for　defect　detection　in　pipes　with　viscoelastic　coatings.