In　this　study,　the　impact　of　multi-jet　structure　on　the　gas-solid　flow　in　a　three-dimensional　integral　multi-jet　spout-fluidized　bed　was　investigated　using　both　numerical　and　experimental　methods.　Particle　Image　Velocimetry　(PIV)　was　applied　to　analyze　the　difference　made　by　integral　multi-jet　to　the　movement　of　particles　in　a　152-mm-diametered　spouted　bed.　The　Eulerian-Eulerian　approach　was　adopted.　Compared　with　the　conventional　spouted　bed,　the　addition　of　the　side　jet　facilitates　particles　to　generate　a　substantial　amount　of　secondary　eddies　and　the　movement　of　particles　can　be　effectively　enhanced　in　the　cross　section　of　the　multi-jet　spout-fluidized　bed.　When　the　number　of　side　jets　approached　N　=　18,　the　particle　concentration　in　the　annulus　region　was　shown　to　to　be　extremely　low.　Considering　the　pressure　drop　of　the　spouted　bed,　the　comprehensive　optimum　number　of　side　jet　of　spouted　bed　was　set　to　N　=　24.　Besides,　there　existed　an　optimum　side　jet　diameter　D　=　4　mm,　at　which　the　side　jet　exerted　the　optimal　fluidizing　effect　on　the　gas-solid　two-phase　flow　in　the　multi-jet　spout-fluidized　bed.　The　distribution　structure　of　the　side　jets　with　lower　density,　upper　sparseness　and　symmetry　contributed　to　the　local　fluidization　of　the　inlet　gas　in　the　dead　zone,　and　Case　D　demonstrated　the　full　fluidizing　effect　on　the　particles　in　the　multi-jet　spout-fluidized　bed.　©　2020　Elsevier　B.V.