Spectralelementmethodiswellknownashigh-ordermethod,andhaspotentialbetterparallelfeatureascomparedwithlowordermethods.Inthispaper,aparallelpreconditionedconjugategradientiterativemethodisproposedtosolvingthespectralelementapproximationoftheHelmholtzequation.Theparallelalgorithmisshowntohavegoodperformanceascomparedtononparallelcases,especiallywhenthestiffnessmatrixisnotmemorized.Aseriesofnumericalexperimentsinonedimensionalcaseiscarriedouttodemonstratetheefficiencyoftheproposedmethod.