  We discuss the perturbative QCD approach for exclusive non-leptonic two body
B-meson decays. We briefly review its ingredients and some important
theoretical issues related to the factorization approach. PQCD results are
compatible with present experimental data for the charmless B-meson decays. We
predict the possibility of large direct CP violation effects in $B^0 \to
\pi^{+}\pi^{-}$ $(23\pm7 %)$ and $B^0\to K^{+}\pi^{-}$ $(-17\pm5%)$. For
charmed decay $B \to D^{(*)}\pi$, we get large non-factorizable contributions
for Color-suppressed decays and obtain $|a_2/a_1|\sim 0.4-0.5$ and
$Arg(a_2/a_1)\sim -42^{o}$. In the last section we investigate the method to
extract the weak phases $\phi_2$ from $B \to \pi\pi$ decay and $\phi_3$ from
$K\pi$ modes. From BaBar measurement of CP asymmetry for the $\pi^{+}\pi^{-}$
decay, the prefered CKM weak phases are: $\phi_1=(24\pm2)^{o}$, $\phi_2=(78\pm
22)^{o}$ and $\phi_3=(78\pm 22)^{o}$.
