Abstract: For sulfur absorption experiment 7 samples were individually collected from Cambrian dolomite and limestone of Hancheng area,and mixed to highsulfur coal on 10% and 25% basis.Results indicated that the sulfur absorption rate is 10%~15% for mid and early Cambrian dolomite;15%~26% for mid and early Cambrian dolomite;30%~47% for lower part of late Cambrian dolomite;10%~20% for middle and upper part of late Cambrian dolomite.The sulfur absorption rate of dolomite is 5~10 percent larger than that of limestone,when the content of dolomite is similar with the content of calcite.