The study investigated mixing different types of coal in a power plant boiler to see how it affects efficiency and environmental impact. By testing combinations of Shenmu coal, lignite, and an optimal mix, they found that blending Shenmu coal in around 33% of the optimal mix led to the best economic performance, with a boiler efficiency of 94.78%. At the same time, when Shenmu coal made up about 33% of the mix with lignite, it resulted in lower pollutant emissions, showing the best environmental benefits. This research shows that tweaking the types of coal used in the boiler can improve both economic efficiency and environmental protection in power plants.