Abstract: In this work the influence of the metal layer Cu and Ag and their thickness on the opto-electrical performance of IMI contact is studied by using Hall measurement,ultraviolet spectrophotometer,Atomic Force Microscope,etc. By optimizing the thickness of intermediate metal layer,ITO/Ag/ITO（IAI）and ITO/Cu/ITO（ICI）contacts with sheet resistance of 11.2 and 14.5 Ω/□ and average transmittance of 93.9% and 86.5% were obtained in the wavelength range of 400-800 nm,respectively. The IAI and ICI layer are used as the front contact in perovskite solar cells. The fill factor of solar cells has increased from 62.5% to 78.0%,while the short-circuit current density is about 1-2 m A/cm~2 lower as compared to the reference cell on ITO contact. This is mainly due to the increased reflectance of IMI in the short wavelength. As the thickness of Cu layer and Ag layer is 7.4 and 6.4 nm,respectively,an optimum cell efficiency has been obtained.