Marble will produce a lot of waste in the process of processing, mainly including stone chips and stone powder. At present, stone chips have been fully reused, but there is no good treatment method for stone powder, so it can only be piled up. If only stone powder is piled, it will not only waste land and resources, but also pollute water sources, which is very harmful. Therefore, how to correctly treat and utilize these stone powder wastes and turn them into treasure has become a very concerned issue for stone enterprises. The main component of waste marble powder is calcium carbonate, and its particle size is small. Calcium carbonate belongs to inorganic particle reinforcement, and it is also the raw material of desulfurizer for limestone/lime-gypsum wet desulfurization. According to this feature, this paper analyzes and studies the resource utilization methods of marble stone powder from two aspects: (1) preparation of marble stone powder/polyethylene waste composite material; (2) Study on the absorption of low concentration SO2 gas by Dali magma. In this paper, the mechanical properties of marble stone powder/polyethylene waste composites are analyzed and studied at first. The experimental results show that the filling amount of stone powder in the untreated waste plastic film has no significant effect on the mechanical properties of stone powder/polyethylene waste plastic composites. After surface modification of stone powder with titanate coupling agent, when the titanate content is 2%, the bending strength, tensile strength and impact strength of the composites reach the best values, which are 33.57MPa, 18.3 1MPa and 44.5 1kj/m2 respectively. After the stone powder was modified with stearic acid, the impact strength of the composite reached the maximum value of 44.57 kJ/m2 when the stearic acid content was 2%, and the tensile strength and bending strength of the composite reached the maximum values of 65438±08.65 MPa and 28.565438±0 MPa when the stearic acid content was 3%, respectively. Secondly, the desulfurization efficiency of marble slurry absorbing low concentration SO2 gas was analyzed and studied. Through orthogonal test, the main factors affecting desulfurization efficiency in the reaction are determined as follows: gas flow > slurry pH value > slurry concentration. The optimum technological conditions for marble slurry to absorb low concentration sulfur dioxide gas are determined: gas flow rate is 200 ml/min, slurry pH value is 5.5, and slurry concentration is 65438 00%. Under the optimum process conditions, the desulfurization rate can reach 99.85%, and the export concentration is lower than the relevant national emission standards.