The invention relates to an organic steel-bar-corrosion-inhibition concrete surface sealing material, and a preparation method and application thereof. The concrete surface sealing material is formed by mixing a compact component, a catalytic component, a permeation component, a stable component and a solvent component. An inorganic nanoparticle preparation technique is utilized to implement high-efficiency sealing of concrete surface pores, thereby effectively inhibiting the volatilization and dissipation of the small-molecule-structure organic corrosion inhibitor in the reinforced concrete. Besides, the concrete surface sealing material does not need primer treatment on concrete, is convenient for construction, and has the same service life as the concrete building. The concrete surface sealing material can effectively ensure the long-term effectiveness of the steel bar corrosion inhibitor under the conditions of high temperature, low humidity and high chloride salt concentration, and has the effect of improving the water impermeability of the concrete surface.