cross section can be large [13]. In addition, if the DM particle is not absolutely stable and can decay dominantly to leptons, we can explain these experiments for the DM lifetime at the or- der τ ∼ 10 $^{25}$− 10 $^{27}$s [14–18]. In particular, in the supersymmetric Standard Models, the LSP neutralino cannot explain the PAMELA/ATIC experiments or the PAMELA/FERMI/HESS experiments unless it can decay due to the suitable R -parity violation dimension-four op- erators. Furthermore, to fit the PAMELA and ATIC data via the Markov Chain Monte Carlo (MCMC) technique, one found that the DM mass is about 700 GeV for annihilation and 1.4 TeV for decay, and the favored final state is e $^{+}$e − [19]. And to fit the PAMELA, FERMI, and HESS data, one found that the DM mass is about 2 TeV for annihilation and 4 TeV for decay, and the favored final states are the combination of µ $^{+}$µ − and τ $^{+}$τ − since the electron/positron spectra in the FERMI and HESS experiments are softer than these in the ATIC and PPB-BETS experiments [19]. Also, the HESS obervation of the Galactic center gamma rays gives strong constraint on the annihilation DM scenario while gives much weaker constraint on the decay DM scenario. Thus, it favors the decay DM [19]. Recently, the Cryogenic Dark Matter Search (CDMS) collaboration has observed two candidate DM events in the CDMS II experiment [20]. The recoil energies for these two events are 12.3 keV and 15.5 keV, respectively, and the data set an upper limit on the DM- nucleon elastic-scattering spin independent cross section around 10 − 8 − 10 − 7 pb. Because the probability of observing two or more background events is 23%, the CDMS II results cannot be a statistically significant evidence for DM interactions, but these two events can not be rejected as signal. In particular, the favored DM mass from the CDMS II data is about 100 GeV. Later, the CDMS II results have been studied extensively in various DM models [21]. Interestingly, the CDMS II experiment can be explained in the supersymmetric Standard Models where the LSP neutralino is DM. In short, if the PAMELA, ATIC, FERMI, and HESS experiments indeed observed the DM annihilations or decays, the corresponding DM particle is heavy around a few TeVs. And if the two events observed by the CDMS II experiment are DM signals, the corresponding DM particle is light around 100 GeV. Therefore, there may exist at least two DM particles in the Nature. In fact, in almost all the previous DM models, the nearly universal implicit assumption is that there is one and only one DM particle. However, we cannot prove this implicit assumption, and then we cannot ingore the possibility of multicomponent DM [22, 23]. In this paper, we propose two supersymmetric Standard Models with decaying and stable DM particles. To avoid the proton decay problem and evade the stringent constraints from the electroweak precision data, we assume that R parity is not violated. In our models, we require that the LSP neutralino be the stable DM particle with mass around 100 GeV and the LSP neutralino-nucleon scattering cross section be about 10 − 8 pb. Thus, we can explain 3