A good rectifying behavior is observed in a temperature range from 80 K to 300 K in the BaTiO3/p-Si heterostructure, which is fabricated by a pulse laser deposition. The diffusion voltage (VD) decreases with the increase of temperature. A significant photocarrier injection effect is also observed with light irradiation. The photocarrier injection effect increases with the energy of photon increasing. Meanwhile, R-T curve of the BaTiO3 film indicates that the oxygen-deficient BaTiO3 is an n-type semiconductor.