  In this paper, the px+ipy topological superconductor with vortex superlattice
is studied. We found that there exist mid-gap energy bands induced by the
vortex superlattice and the mid-gap energy bands have nontrivial topological
properties including the gapless edge states and non-zero winding number. An
topological anisotropic tight-binding Majorana lattice model is proposed to
describe the mid-gap states.
