Abstract: Nowthemainnumericalsimulationmethodofhighefficiencymultiplasmathruster（HEMPT）isparticleincell.Butthismethodputshigherdemandsoncomputer.Therefore，thismethodaimsatreappearingtheoscillationphenomenoninhighefficiencymultiplasmathrusterbybuildinguponedimensionfluidmodelandstudyingtheplasmaparametersdistributionandtherelationshipbetweenthecurrentandplasmaparameters.AonedimensionfluidmodelwasbuiltupalongtwodistinguishingtypicalelectronpathsinthrustersbySimulink.Thesimulationresultsshowthattheplasmaparametersoscillationperiodisconsistentwiththatofthecurrent.Themainionizationzoneisbetweenthetwocuspedfields.Themainareawherepotentialdropsisnearthechannelexit.  

Key words: highefficiencymultiplasmathruster, onedimensionfluidmodel, oscillation；current, electronconductivity, potentialdistribution