In order to find a good approach to suppress the carbon deposition on Ni surface for Ni/YSZ anode of solid oxide fuel cells, in this work, the Ni surface was modified by GDC nanoparticles with tens of nanometer by using pulse laser deposition technique. The carbon deposition experiment was carried out for the samples with exposing to dry 5% CH₄-Ar mixture at 800 ^oC for 3 h. The severe carbon deposition behavior is observed on Ni film for Ni/YSZ. On the other hand, the suppression of carbon deposition behavior appeared for Ni/YSZ modified by GDC nanoparticles. The high catalytic activity of this modified Ni/YSZ is confirmed in humid methane by investigating the methane and hydrogen conversion. It suggests that the modification of Ni surface using GDC nanoparticles is a good approach to suppress the carbon deposition behavior for Ni/YSZ when methane is used directly as the fuel gas.