Through the experiment study of bond performance of coal gangue fly ash, coal gangue loess as solid filling material performance, the strength of filling body performance of coal gangue fly ash, coal gangue loess were analyzed, cement was taken as the bond material, the strength influence of cement to gangue loess solid filling material was analyzed. The experiment result showed that the filling strength of coal gangue loess as solid filling material was stronger than gangue fly ash, adding the cement into gangue loess solid filling material, with the increase of dosage, filling body strength, especially the early strength improved greatly, shortened the filling mining period and reduced the production cost.