  We use multi-component decaying dark matter (DM) scenario to explain the
possible cosmic ray excesses in the positron fraction recently confirmed by
AMS-02 and the total $e^+ +e^-$ flux observed by Fermi-LAT. In the
two-component DM models, we find an interesting variation of the flavor
structure along with the cutoff of the heavy DM. For the three-component DM
case, we focus on a particular parameter range in which the best fits prefer to
open only 2 DM decay channels with a third DM contributing nothing to the
electron and positron spectra. We show that all models give the reasonable fits
to both the AMS-02 positron fraction and the Fermi-LAT total $e^++e^-$ flux,
which are also consistent with the measured diffuse $\gamma$-ray flux by
Fermi-LAT.
