  In this paper, we investigate the strong gravitational lensing by the
stationary, axially-symmetric black hole in Kerr-Taub-NUT spacetime in the
strong field limit. The deflection angle of light ray and other strong
deflection limit coefficients are obtained numerically and they are found to be
closely dependent on the NUT charge $n$ and spin $a$. The magnification and the
positions of the relativistic images are computed. The caustics are studied and
the results show that these caustics drift away from the optical axis, which is
quite different from the Schwarzschild black hole case. Moreover, the
intersections of the critical curves on the equatorial plane are obtained and
it is shown that they increase with the NUT charge. These results show that
there is a significant effect of the NUT charge on the strong gravitational
lensing.
