The invention relates to a method for remediating heavy metal contaminated soil through combination of carex nubigena and ciliate desert-grass, and belongs to the technical field of environment protection plant remediation. The method for remediating heavy metal contaminated soil through combination of the carex nubigena and the ciliate desert-grass includes the four treatment steps of seedling culture, interplant, harvesting and incineration. Firstly, seedling culture of the ciliate desert-grass and collection of the carex nubigena are completed; then ciliate desert-grass seedlings growing to 40 cm are transplanted, the carex nubigena is transplanted between line spaces of the ciliate desert-grass, the carex nubigena and the ciliate desert-grass are cut 1-2 times every year, the carex nubigena and the ciliate desert-grass are reserved 3-8 cm on the ground during cutting for overwintering, and finally harvested carex nubigena and harvested ciliate desert-grass are both subjected to incineration in a metallurgical furnace for harmless treatment. The carex nubigena and the ciliate desert-grass are used for conducting combined remediation on the heavy metal contaminated soil due to the hyper-accumulation characteristic on lead, zinc, copper, cadmium and arsenic in the soil, the remediation effect is more obvious than that of a traditional soil remediation method, the method is clean and efficient, and the remediation cost is low.