In　order　to　improve　the　design　and　development　efficiency　of　the　pressure　compensating　drip　irrigation　emitter,　a　step-by-step　computational　fluid　dynamics　(CFD)　design　method　combined　with　finite　element　technology　was　proposed　in　the　paper.　The　emitter　flow　rate　was　predicted　by　the　step-by-step　CFD　method　and　the　designed　pressure-flow　(P-Q)　curve　of　the　emitter　was　obtained.　The　test　samples　of　pressure　compensating　emitter　were　manufactured　by　means　of　rapid　prototype　and　manufacturing　technology,　the　hydraulic　performance　experiment　of　the　emitter　was　carried　out　and　the　experimental　P-Q　curve　was　obtained　consequently.　The　results　showed　that　the　predicted　values　were　coincident　with　the　experimental　results　well　within　normal　range　of　the　emitter＇s　working　pressures,　which　verified　the　step-by-step　CFD　design　method.　On　this　basis,　the　influence　of　the　emitter　structure　on　its　pressure　compensating　performance　was　studied,　which　showed　that　the　height　of　pressure　compensating　chamber　had　significant　effect　on　the　emitter　pressure　compensating　performance,　based　on　that　the　series　of　pressure　compensating　emitter　could　be　designed　by　changing　the　chamber　height.　This　research　can　provide　a　reference　for　design　and　development　of　pressure　compensating　drip　emitter.