NOx　and　soot　emissions　from　diesel　engines　can　be　greatly　reduced　by　pressure　wave　supercharging.　The　exhaust　pipes　in　the　diesel　engine　matched　with　pressure　wave　supercharger　(PWS)　need　to　be　redesigned.　The　exhaust　gas　must　be　stable　in　pressure　before　rushing　into　the　PWS,　and　the　requirements　for　installation　have　to　be　met　also.　The　lateral　and　center　ported　divergent　exhaust　pipes　are　designed,　modeled　geometrically　and　analyzed　structurally　based　on　a　3D　design　software　CATIA,　to　determine　the　structure　of　two　exhaust　pipes.　The　flow　analysis　for　these　two　exhaust　pipes　is　carried　out　using　a　flow　analysis　software　ANSYS.　The　better　exhaust　pipe　was　determined　synthetically　and　tested　in　bench.　The　test　results　show　that　PWS,　comparing　to　turbo　charging,　is　superior　under　low　engine　speed,　close　under　medium　speed　and　inferior　under　high　speed　in　power　and　emission.