Antireflection film and preparation method thereof as well as antireflection glass

The invention discloses an antireflection film and a preparation method thereof as well as antireflection glass. The antireflection film comprises a first refractive index adjusting layer, a second refractive index adjusting layer, a third refractive index adjusting layer, a fourth refractive index adjusting layer and a fifth refractive index adjusting layer, which are sequentially superposed; the material of the first refractive index adjusting layer is Si3N4; the material of the second refractive index adjusting layer is SiO2; the material of the third refractive index adjusting layer is SiN; the material of the fourth refractive index adjusting layer is SiO2; and the material of the fifth refractive index adjusting layer is SiN. The antireflection film is relatively high in hardness and good in insulating property.