A2-Dslab-symmetricmodelofmixedconvective-stratiformcloudisdevelopedbysuperimposingconvectivecloud-sizefieldontheconvergencefield,inordertosimulateandstudythemixedcloudsconsistingofstratiformcloudandconvectivecloud.Adeepconvective,anelasticandconservativesystemofequationswithbasicvariables(V,θ,π’)issolvedbyanewmethodtocalculatedynamicfield.Thewatersubstanceinthecloudispidedinto6categoriesandthemicrophysicalprocessesaredescribedinspectrumwithtwovariableparametersandmorereasonableparticlenumber/sizedistributions.Tocomparewithmeasuredradarechointensityandstructure,themodelmaycalculateechointensityofthemodelcloudobservedbyradar.
