The present disclosure relates to a method for manufacturing a positive electrode for a lithium-sulfur battery including: (1) mixing a sulfur-carbon composite and a binder to prepare a slurry for a positive electrode active material; (2) applying the slurry for the positive electrode active material to one surface of the current collector; (3) a first drying step of drying the current collector, to which the slurry is applied, using hot air and medium wave infrared radiation; and (4) a second drying step of drying the current collector, to which the slurry is applied, using a laser heat source after the first drying step (3).