In this paper, the emission of photoelectrons in the Ag-BaO thin film prepared by a cold deposition method has been studied. The quantum yield of the film irradiated by an ultrashort pulse laser with a wavelength of 0.53μm is more than 10-4, and the photoemissive threshold of the film to laser intensity is 10W/cm2. The curve of photoelectric current density vs. laser intensity is not linear. It shows a slope which decreases with increasing light intensity. The quantum yield of the photoemission is variable. This phenomenon is related to the laser intensity and the film characteristics.