  Diboson resonance with mass around 2 TeV in the dijet invariant mass spectrum
is reported by ATLAS experiment in proton-proton collisions at $\sqrt{s}=8$
TeV. We propose that the candidate of resonance is a heavy neutral Higgs $H^0$
or charged Higgs $H^\pm$ and use the extended two-Higgs-doublet (THD) to
demonstrate the potentiality. We find that the large Yukawa coupling to the
first generation of quarks can be realized in THD and the required value for
producing the right resonance production cross section is of ${\cal
O}(0.06-0.2)$. Besides $WW/ZZ$ channels, we find that if the mass of
pseudoscalar $A^0$ satisfies the jet mass tagging condition $|m_j - m_{Z/W}|<
13$ GeV, the diboson excess could be also caused by $ZA^0$ or $WA^0$ channel.
