The invention relates to a preparation method for a lithium-sulfur battery. The lithium-sulfur battery comprises the following raw material compositions in parts by mass: 7-10 parts of steady-state lithium powder, 3-8 parts of carbon material and solvent. According to the preparation method, the steady-state lithium powder and a mixture mixed by a vertical array carbon nanotube (VACNT) and mesoporous carbon at the mass ratio of 10:1 are taken as the carbon material used in a negative electrode to prepare negative electrode mixed paste, so that use of a binder in the negative electrode paste can be avoided, and the lithium-sulfur battery negative electrode material is more excellent in performance; meanwhile, by matching with the optimized positive electrode material, the battery prepared by the preparation method is relatively low in impedance, and a shuttle effect and dendritic growth in a continuous charge/discharge process can be effectively weakened; and in addition, compared with the conventional metal lithium foil, the lithium-sulfur battery is better in cycling performance and higher in rate capability.