Abstract: 【Objective】The graphitic carbon nitride(g-C₃N₄)was immobilized on wood surface to decrease the use of poisonous chemical coating material in wood surface modification and imparted self-cleaning property to wood products.【Method】The g-C₃N₄ samples were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction, and elemental analysis(EA). Their spectral data were consistent with previous reports.The scanning electron microscope(SEM)images showed that the wood surface was coated with g-C₃N₄. The modified wood surface could degrade MO under visible light.【Result】The synthesized micrometer-scale g-C₃N₄ with amino groups processed the highly photocatalytic activity. Especially, the g-C₃N₄ prepared under 520 ℃ had the best performance. Although g-C₃N₄ immobilized on the wood surface showed a lower photocatalytic activity than free g-C₃N₄ did, it retained enough efficiency.【Conclusion】We successfully synthesized the g-C₃N₄ with highly reactivity. The wood surface was imparted self-cleaning property by immobilizedg-C₃N₄ samples.