In order to study the influence of fiber gird type, surface treatment of old cement concrete and fiber grid, coarse aggregate limiting grain size on splitting tensile bonding strength between new and old cement concrete, ten groups of specimens with dimension of 150mm×150mm×150mm were tested for splitting tensile strength. The splitting tensile failure process was analyzed, then the mechanism of bonding between fiber grid and new and old cement concrete was discussed. The result demonstrates that the splitting tensile bonding strength becomes maximal when the basalt fiber grid with dimension of 5mm is used, the surface treatment of old concrete and fiber grid have great influence on splitting tensile bonding strength between new and old cement concrete, but the coarse aggregate limiting grain size have little influence on it.