The invention discloses a method for interactively roasting bismuth sulfide ore and pyrolusite to extract bismuth and co-produce manganese sulfate. The method comprises the following steps: 1) grinding and mixing bismuth sulfide ore and pyrolusite; 2) placing the mixed ore in roasting equipment, wherein the roasting temperature is 400-900 DEG C and the roasting time is 1-7 hours; 3) performing neutral leaching on the roasted product through water to obtain lixivium I containing manganese sulfate and leaching residue I containing bismuth; and 4) performing acid leaching treatment on the leaching residue I through an inorganic acid to obtain lixivium II containing rich bismuth and leaching residue II. The method disclosed by the invention can be used for not only obtaining a manganese sulfate product, but also directly extracting bismuth or obtaining chemical products of bismuth. According to the method disclosed by the invention, the problems of high energy consumption, high cost and pollution of low-concentration sulfur dioxide in an existing pyrogenic smelting process of bismuth sulfide ore are overcome, the problems of severe corrosion, high equipment requirements and the like caused by strong oxidant in a wet process are solved, and therefore the method is a clean and efficient bismuth smelting process.