In this study, the fundamental properties of metallurgical solid waste were investigated firstly. Based on which, the experiments of metallurgical solid waste adding in pelletizing process were studied. The results showed that it is possible to add metallurgical solid waste in pelletizing process. But in order to meet the blast furnace production requirements, the ratio of metallurgical solid waste should not be more than 15%, and the roast temperature should be above 1250°C. This work can provide theoretical and technical basis for using metallurgical solid waste in pelletizing process.