Y and Mn co-doped BaTiO₃ ceramics were prepared by the conventional solid state reaction. The phases, microstructures and compositions of the prepared samples were characterized by X-ray diffractometer, scanning electron microscope and energy dispersive spectrometer, respectively, and the electrical parameters were measured. Results showed that the room temperature resistance of BaTiO₃ could be effectively decreased by Y doping. However, the excessive Y would segregate at the grain boundary, which weakened the PTC effect of BaTiO₃ ceramic, combined with Mn at the grain boundary. Through the coordinating behavior between grain and grain boundary, the PTC effect of BaTiO₃ ceramic could be efficiently tailored.