This paper prepared a gradient-index antireflection PV glass with two-step etching method. SEM analysis shows that microstructure size of antireflection layer is 20-30 nm and layer thickness is 100-300 nm. Gaussian-like index profile of antireflection layer was affirmed by calculated simulation. The bandwidth of the transmittance more than 96% of the gradient-index broadband antireflection PV glass exceeds 1200 nm. The transmittance in the band of 390-1022 nm is more than 99% while the double-faced reflection in the band of 350-1084 nm is less than 1%. Especially, the double-faced reflection in the band of 624-922 nm is less than 0.2%.