A　compound　damp　drip　for　absorbing　shock　wave　in　oscillatory　tube　is　developed.　The　main　idea　of　the　concept　is　that　the　shock　wave　absorber　must　have　two　functions,　one　is　that　it　can　exhaust　the　energy　of　the　incident　shock　wave　fully,　the　other　is　that　it　can　transfer　the　energy　out　promptly.　In　the　experiment,　the　compound　damp　drip　is　structured　with　a　multi-orifice　for　intensifying　the　energy　dissipation　of　the　shock　wave　and　an　internal　cooling　system　for　strengthening　the　heat　transfer.　The　experimental　results　show　that　a　strong　reflect　shock　wave,　whose　strength　is　66%　of　the　incident　shock　wave,　is　measured　at　the　position　of　the　relative　tube　length　x/L=0.3　when　the　oscillatory　tube　without　the　compound　damp　drip.　After　the　compound　damp　drip　is　amounted　at　the　closed　end　of　the　tube,　the　reflect　shock　wave　is　eliminated　effectively　and　the　refrigerating　efficiency　η　is　increased　by　4%-10%　in　case　of　that　the　L/d　ratio　is　140　and　the　expansion　ratio　Ε　is　changed　from　2.0　to　6.0.　What　is　more,　the　refrigerating　efficiency　in　case　of　that　the　L/d=140　and　the　tube　is　mounted　with　the　compound　damp　drip　is　still　higher　by　2%-6%　than　that　the　tube　without　damp　drip　but　L/d=300.　The　above　result　means　that　while　the　damp　drip　is　used,　the　refrigerating　efficiency　can　be　increased　and　the　size　of　the　refrigerator　can　be　decreased　significantly.