The invention relates to a cathode material for a lithium-sulfur battery and preparation and an application of the cathode material. The cathode material comprises elemental sulfur particles and metal sulfides, wherein one or more than two metal sulfides coat the surfaces of the elemental sulfur particles; and the metal of the metal sulfides is one or more than two of Zn, Fe, Cd, Pb, Cu or Ag. The metal sulfides have semiconductor properties, so that certain electron conductivity can be provided; the metal sulfides have good lithium ion transmission capabilities; lithium ion transmission in a tight coating condition is ensured; coating of the metal sulfides on the elemental sulfur surface can be achieved in a mild chemical environment; and the method is simple and feasible.