The invention discloses a method for producing titanium slag and chlorinated titanium dioxide by using Panzhihua ilmenite, and relates to the field of metallurgy and chemical engineering. The method comprises the following steps: firstly, carrying out reduction smelting on ilmenite by utilizing an HIsmelt smelting reduction technology to obtain titanium slag and pig iron; then feeding the titaniumslag as a raw material into a chlorination furnace, producing titanium dioxide by adopting a molten salt chlorination method; recycling and separating molten salt slag obtained in the production process, and returning the separated sodium chloride into the chlorination furnace. In the titanium slag smelting process, ilmenite powder can be directly utilized, wherein a reducing agent can be commonanthracite with low requirements or contains part of bituminous coal; meanwhile, smelting can be conducted at a low temperature, energy consumption is greatly reduced, and the additional value of by-product pig iron is high; in titanium dioxide chloride production by using the titanium slag, the cyclone dust removal device has a good dust collection effect on flue gas, reduces the impurity contentin crude titanium tetrachloride, effectively utilizes the molten salt slag, reduces the accumulation amount of the molten salt slag, and has good green and environment-friendly significance.