Different from atoms, the multicenter of the Coulombic potentials in molecules makes the tunneling ionization com-plex, and the electron tunnels out the laser-dressed Coulomb potential with a complex structure. We study tunneling exits of H+2 at large inteuclear distance in strong laser fields by numerically simulating the time-dependent Schr?dinger equation plus a classical backward propagation of the ionized wave packet. This study strengthens the understanding of molecular tunneling ionization in strong laser fields.