The corrosion inhibition behavior of LaFe11.6Si1.4 alloy in water solution was studied by electrochemical measurements and scanning electron microscope. The results show that the corrosion behavior is inhibited remarkably by Na2WO4 solution with different concentrations or NaH2PO4 solution with low concentration. The inhibition effect is due to the slow anodic dissolution reaction, and the slow diffusion at low concentration of inhibitor.