The invention provides a method for producing sodium lignin sulfonate by using high-sulfur coal, belonging to the technical field of comprehensive utilization of resources. According to the method provided by the invention, the combustion heat of the high-sulfur coal is used and SO2 generated in combustion of the high-sulfur coal is used to sulfonate and modify lignin in the alkaline pulping papermaking black liquid so as to produce the sodium lignin sulfonate product, thus realizing efficient utilization of the high-sulfur coal. The use ratio of the sulfur dioxide generated in combustion of the high-sulfur coal is over 95% in a spray drying tower; after treatment by a desulfurizer in subsequent process, the removal rate of the sulfur dioxide in the final discharged smoke reaches 99%, so that up-to-standard release is realized. The method is simple, has low cost, not only lowers pollution, but also produces high value-added product sodium lignin sulfonate, and has considerable economic benefits.