To　study　the　mechanical　and　acoustic　properties　of　natural　gas　hydrate-bearing　sediments，the　pipelines　of　high-pressure　and　temperature-controlled　triaxial　apparatus　are　replanned，and　GCTs　ultrasonic　test　system　is　introduced.　To　verify　the　reliability　of　the　apparatus，specimens　with　various　hydrate　saturations　were　prepared　with　Fujian　sand　and　CH4　gas，and　drainage　triaxial　tests　were　performed　under　different　effective　confining　pressures.　The　results　show　that　hydrate-bearing　specimens　can　be　prepared　and　tested　stably，and　the　compression　and　shear　wave　velocity　can　be　measured　in　real　time　during　tests.　The　change　of　wave　velocity　is　related　to　the　change　of　compactness　and　particle　distribution　inside　the　specimen，and　can　reflect　volume　change　anddilatancy　characteristics.　Poisson’s　ratios　of　specimens　were　calculated　by　the　wave　velocities　after　consolidation，which　were　about　0.16-0.31.　©　2023　Science　Press.　All　rights　reserved.