The damping vibration performance of the blade after metallization of steam turbine blades is studied. The turbine impeller was simplified and then modeled by ug software, and the modal analysis is carried out on the integral blade disk of the same thickness of the aluminum, titanium, aluminum titanium film blade and the uncoated blade by ANSYS software. The vibration pattern and natural vibration frequency are obtained, and the vulnerable parts of the impeller are observed as a whole；Harmonic response analysis of a single blade,The deformation of the four blades under the same load was further analyzed, and their damping effects were discussed.Combined with the experimental results, the test specimens were subjected to aluminum plating, titanium plating, aluminum plating first and then titanium plating treatment, and uncoated specimens formed a control group.Testing the damping performance of coatings with a Dynamic Mechanical Thermal Analyzer (DMA).The results show that the deformation of each step mode of the blade after coating is smaller than that of the blade without coating，it can play a certain damping effect on the blade coating.