The　suction　valve　is　an　essential　one-way　valve　inside　the　reciprocating　compressor　controlling　the　suction　gas　flow.　It　is　usually　installed　on　the　cylinder　head　of　the　compressor.　However,　the　suction　valve　in　oil-free　mini　compressors　was　preferred　to　be　installed　on　the　piston　to　cool　down　the　bearing　inside　the　piston　by　the　suction　flow.　In　this　case,　the　motion　of　the　piston　will　act　varying　accelerated　speed　on　the　valve　plate.　During　its　opening　process,　the　valve　plate　would　be　pushed　by　resultant　force　of　the　inertia　force　generated　by　the　accelerated　speed　and　the　flow　thrust　together.　It　would　result　in　too　high　valve　lift　and　deformation,　and　decrease　the　reliability　of　the　valve　plate　extremely.　For　this　reason,　the　stiffness　of　the　valve　on　the　piston　should　be　greater　than　that　on　the　cylinder　head.　However,　stiffness　strengthened　valve　plate　moving　with　the　piston　would　behaves　oscillation　motion　during　its　opening　and　closing　process.　In　this　paper,　a　three-dimensional　fluid-structure　interaction　(FSI)　model　validated　by　experiments　was　established　using　ADINA　to　study　the　oscillation　motion　of　the　valve　installed　on　the　piston.　Obtained　results　showed　that　the　lift　integral　of　the　valve　on　the　piston　was　4.5%　less　than　that　of　the　valve　on　the　cylinder　head,　and　the　impact　speed　on　the　valve　seat　of　the　valve　on　the　piston　was　smaller　than　that　of　the　valve　on　the　cylinder　head,　which　indicated　that　the　suction　valve　installed　on　the　piston　had　higher　reliability.　©　2022