  The annihilation type diagrams are difficult to calculate in any kind of
models or method. Encouraged by the the successful calculation of pure
annihilation type B decays in the perturbative QCD factorization approach, we
calculate the pure annihilation type $D\to PP(V)$ decays in the perturbative
QCD approach based on the $k_T$ factorization. Although the expansion parameter
$1/m_D$ is not very small, our leading order numerical results agree with the
existing experiment data for most channels. We expect the more accurate
observation from experiments, which can help us learn about the dynamics of $D$
meson weak decays.
