The morphology of the protection film of AMT formed on bronze has been observed byscanning tunneling microscopy in angstrom scale. Three to five ellipse units join together to forma linear structure. Many such linear structures make up the protection film to prevent corrosionprocess of bronze. After analysis the reactivity of AMT witll Cu (Ⅱ ) by XPS,XAES and IR, theconclusion has been obtained as follow: corrosion product Cu(Ⅱ ) combined with AMT forming acomplex compound which deposits on the bronze from the protection film. The structure has beendescribe in the letter.