Based　on　the　characteristics　of　clay　compression　and　the　Kozeny-Carman　equation,　the　relation　between　seepage　flow　velocity　and　centrifugal　accelerations　is　deduced　considering　the　change　of　intrinsic　permeability.　An　apparatus　for　constant　head　seepage　tests　is　developed　considering　the　set-up　of　conventional　seepage　test　apparatus　and　the　characteristics　of　centrifugal　model　tests.　A　series　of　seepage　tests　(1g,　10g,　20g,　30g)　are　performed　on　Nuozhadu　core-wall　clay　by　means　of　the　apparatus.　It　is　concluded　that　the　ratio　of　Ng　and　1g　hydraulic　conductivity　decreases　with　the　increase　of　centrifugal　acceleration,　but　the　variation　is　small　and　the　ratio　is　close　to　N.　The　research　results　are　important　for　understanding　the　scaling　of　seepage　flow　velocity　in　centrifuge　models.