In　order　to　study　the　floating　and　heat　transfer　characteristics　of　catalyst　particles　in　oscillating　flow　reactor　(OFR),　a　self-made　OFR　device　was　employed　to　measure　the　floating　velocity　and　heat　transfer　coefficient　under　different　operating　conditions　and　solid　volume　fractions　(Ren:　203–1008,　Reo:　269–3307,　αs:　5%–20%),　and　the　corresponding　mathematical　models　were　proposed.　The　results　shown　that　oscillatory　force　had　a　high　correlation　with　the　solid　phase　volume　fraction　in　OFR,　and　the　floating　velocities　in　OFR　were　obtained　by　experiments　and　models　respectively.　Compared　with　other　drag　force　models,　the　Gidaspow　and　Arastoopour　model　can　better　describe　the　force　between　catalyst　particles　and　liquid　in　OFR.　The　heat　transfer　coefficient　increased　first　and　then　decreased　with　increasing　oscillatory　intensity,　and　it　decreased　with　increasing　solid　volume　fraction.　The　predicted　values　of　floating　velocity　Uf　and　heat　transfer　coefficient　hOFR　were　compared　with　the　experimental　data,　and　the　results　shown　that　most　of　relative　errors　of　Uf　and　hOFR　are　within　the　range　of　20%　and　30%　respectively　in　this　paper.　The　research　results　provide　basic　data　and　theoretical　base　for　the　industrial　application　of　OFR.　©　2021　Elsevier　B.V.