The invention relates a preparation method of a sulfur-containing composite anode for a lithium-sulfur battery, and a lithium-sulfur battery using the composite anode. According to the invention, a carbon fluoride additive with electrochemical activity is added in a process of sulfur-containing anode processing to prepare a composite sulfur-containing anode, so that the electrochemical activity of the sulfur-containing anode with a high sulfur content is improved, and the first electro-discharge specific energy of the lithium-sulfur battery is improved. The mass ratio of the active additive of the carbon fluoride to whole active substances is 20%-50%. The invention provides the preparation method of the sulfur-containing composite anode; on one side, since the electro-discharge product of the active additive of the carbon fluoride, the conductivity can be improved in the following electro-discharge process of a sulfur material, so that the sulfur-containing anode with a high sulfur content discharges normally; on the other side, carbon fluoride has electrochemical activity, the electro-discharge capacity isn't affected; the electro-discharge voltage of the anode is improved; and the first electro-discharge specific energy of a lithium-sulfur battery, especially a lithium-sulfur primary battery, is increased.