Abstract: A coal-fired power plant located in the western region of China with low comprehensive utilization rate of coal-fired solid waste was selected as the target power plant to simultaneously consume solid waste (fly ash and desulfurization gypsum) and CO₂. Firstly, the carbon sequestration potential of different blending ratios of coal-fired solid waste was evaluated and the optimal blending ratio was selected. Secondly, the environmental risks of coal-fired solid waste after carbon sequestration were evaluated from the perspectives of total controlled elements, migration risks of controlled elements, and comprehensive environmental risks. Finally, the carbon sequestration products of coal-fired solid waste were used to prepare ecological permeable bricks, and the environmental and economic benefits of the products were analyzed to promote the resource utilization, reduction, harmlessness, and collaborative carbon reduction of coal-fired solid waste. The results showed that the maximum carbon sequestration of coal-fired solid waste could reach 38.31 g/kg under the set experimental conditions. Before the carbon fixation reaction, fly ash posed a greater comprehensive environmental risk to storage sites compared to desulfurization gypsum, which could effectively neutralize the environmental risks of fly ash. After the carbon fixation reaction, the environmental risk of fly ash carbon fixation products was lower than before carbon fixation due to the reduced migration risk of various controlled elements. The migration risk of Hg in desulfurization gypsum was significantly increased after carbon fixation, which increased the environmental risk of desulfurization gypsum. The trend of environmental risk change of mixed solid waste was between the two types of solid waste. Compared with traditional sand bricks, the production of ecological permeable bricks from carbon sequestration products of coal-fired solid waste could reduce CO₂ emissions by 94.3 kg/t, and the compressive strength could reach over 30 MPa.