La0.9Sr0.1MnO3 film has been fabricated on (100) LaAlO3 by direct-current magnetron sputtering. The quality of the film is good as monitored by atom force microscopy and X-ray diffraction. The resistivity-temperature curve shows that the film undergoes metal-insulator transition at 281 K. The peak resistivity decreases with increasing current and the current-induced electro-resistance is 30.5% at 4 mA. The results are simply explained by phase-separation theory.