Abstract: Laboratory shear tests and discrete element numerical simulation were carried out to investigate the effect of infilled thickness and bolting structure on the shear characteristics of jointed rock mass. The results of laboratory tests show that the peak shear stress of jointed rock mass specimens can be significantly increased by bolting structure before it failure. With the increase of infilled thickness, the peak shear stress of jointed rock specimen decreases, while the ultimate shear displacement of bolt increases. The numerical models with different infilled thicknesses were established, and the influence laws of shear displacement, peak shear stress, normal displacement and microscopic crack were analyzed by numerical simulation. The macroscopic results show that the smaller the normal stress is,the larger the normal displacement is. The normal displacement of the bolted infilled joint is larger than that unbolted. The microscopic results showed that the total number of cracks increases with the increase of normal stress, and the total number of cracks in the bolted specimens is significantly higher than that in the unbolted specimens.