An antireflective coating composition, antireflection films and fabrication method thereof. The antireflection film is constructed by stacked crosslink colloid particles, having a plurality of nanopores distributed uniformly therein. Due to the nanopores, the antireflection film has a refractive index less than 1.45, reducing the reflectivity of less than 3.0%. Furthermore, since the antireflection film comprises crosslink oxide colloid, the film exhibits superior mechanical strength and is suitable for use in display devices.