  LHCb collaboration has recently announced a measurement of the difference of
time-integrated CP asymmetries between $D\rightarrow K^+K^-$ and $D \rightarrow
\pi^+\pi^-$. This result provides the evidence of large direct CP violation in
$D$ meson and reveals some important implications on underlying new physics. It
is shown that the direct CP violation in $D$ meson can be enhanced by R-parity
violating supersymmetry, while CP violations in $K$ and $B$ mesons are
suppressed by this new physics, which is in consistence with previous
experiments. Constraints on the model parameters and some consequences are also
discussed.
