  In minimal supersymmetric standard model the R-parity violating interactions
can induce anomalous top pair productions at the LHC through the t-channel
process d_R \bar d_R -> t_L \bar t_L by exchanging a slepton or u-channel
process d_R \bar d_R -> t_R \bar t_R by exchanging a squark. Such top pair
productions with certain chirality cause top quark polarization in the top pair
events. We found that at the LHC, due to the large statistics, the statistical
significance of the polarization observable and thus the probing ability for
the corresponding R-parity violating couplings are much higher than at the
Tevatron upgrade.
