The invention discloses a lithium-sulfur battery positive electrode pole piece and a preparation method thereof, which aim to reduce the shuttle effect in the charging and discharging process of a lithium-sulfur battery, and improve the energy density and the charge and discharge cycle performance of the lithium-sulfur battery positive electrode pole piece under high load. The lithium-sulfur battery positive electrode pole piece comprises a positive electrode active substance, a first conductive agent, a first binder, an additive and a composite substrate. The adopted C/WS2-TCF/S structure hasthe advantages of flexibility, porosity, good self-supporting capability and conductivity, and can omit the use of a metal current collector, thus has a larger size changing space, thereby ensuring good performance under high load.