The　falling　film　flow　characteristics　of　the　liquid　in　corrugated　sheet　packing　are　the　key　factors　affecting　its　mass　transfer　performance.　In　this　work,　a　falling　film　flow　experimental　bench　was　built　and　combined　with　computational　fluid　dynamics　to　study　the　falling　film　flow　of　the　corrugated　sheet,　the　influence　of　spray　density　and　corrugation　tilt　angle　on　flow　characteristics　was　analyzed,　and　quantitative　information　of　average　liquid　film　thickness　and　the　effective　wetting　area　was　obtained　through　three-dimensional　simulation.　The　results　showed　that　the　three-dimensional　CFD　model　can　accurately　predict　the　liquid　falling　film　flow　behavior　and　calculate　the　characteristic　parameters.　The　flow　of　liquid　on　the　corrugated　sheet　was　not　homogeneous　but　was　classified　as　two　kinds　of　forms:　groove　flow　and　rivulet　flow.　As　the　spray　density　was　low,　the　liquid　flow　formed　a　groove　flow　in　the　trough　while　it　changed　as　rivulet　flow　along　the　adjacent　ripples　when　the　spray　density　reached　400　m3/(m2·h),　compared　with　channel　flow,　the　rivulet　form　was　more　beneficial　to　increase　the　contact　area　of　gas　and　liquid.　However,　no　matter　which　flowed　mode,　the　overall　wettability　of　the　corrugated　sheet　was　poor,　and　the　thickness　distribution　of　the　liquid　film　was　not　uniform,　which　was　not　conducive　to　mass　transfer.　The　tilt　angle　of　the　corrugation　had　a　greater　influence　on　the　flow　characteristics　of　the　falling　film,　after　extensive　research　on　the　tilt　angle,　it　was　found　that　when　the　tilt　angle　was　90°,　it　was　more　conducive　to　increasing　the　effective　wetting　area　and　reducing　the　average　liquid　film　thickness.　The　results　of　this　study　have　theoretical　guiding　significance　for　controlling　the　liquid　film　thickness　and　increasing　the　effective　wetting　area　during　the　falling　film　flow,　and　also　have　application　value　for　improving　the　corrugated　sheet　structure　and　increasing　the　mass　transfer　efficiency.　©　2021,　China　Science　Publishing　&　Media　Ltd.　All　right　reserved.