  We examine the status of dark matter (heavy photon) in the littlest Higgs
model with T-parity (LHT) in light of the new results from the LHC Higgs
search, the Planck dark matter relic density and the XENON100 limit on the dark
matter scattering off the nucleon. We obtain the following observations: (i)
For the LHC Higgs data, the LHT can well be consistent with the CMS results but
disfavored by the ATLAS observation of diphoton enhancement; (ii) For the dark
matter relic density, the heavy photon in the LHT can account for the Planck
data for the small mass splitting of mirror lepton and heavy photon; (iii) For
the dark matter scattering off the nucleon, the heavy photon can give a
spin-independent cross section below the XENON100 upper limit for $m_{A_H}>95$
GeV ($f> 665$ GeV); (iv) A fit using the CMS Higgs data gives the lowest
chi-square of 2.63 (the SM value is 4.75) at $f\simeq$ 1120 GeV and
$m_{A_H}\simeq$ 170 GeV (at this point the dark matter constraints from Planck
and XENON100 can also be satisfied). Such a best point and its nearby favored
region (even for a $f$ value up to 3.8 TeV) can be covered by the future
XENON1T (2017) experiment.
