  The simplest version of the dynamical holographic QCD model is described by
adding the KKSS model action on a dilaton-graviton coupled background, in which
the AdS$_5$ metric is deformed by the gluon condensation and further deformed
by the chiral condensation. In this framework, both the chiral symmetry
breaking and linear confinement can be realized, the light-flavor hadron
spectra and the pion form factor were investigated but it was difficult to
reconcile the light-flavor hadron spectra and pion form factor. By considering
the anomalous 5-dimension mass correction of the scalar field from QCD running
coupling, it is found that the light flavor hadron spectra and pion form factor
can be described well simultaneously, especially the ground state and lower
excitation states of scalar, pseudo scalar and axial vector meson spectra are
improved, but the vector meson spectra is not sensitive to the anomalous
5-dimension mass correction of the scalar field.
