According to the calculation formula in 6.8 of GB/T 39552.2-2020 Sunglasses and sunglare filters-Part 2: Test Methods, this work changes the test method and wavelength interval to test the anti-reflective properties of various sunglare filter samples with the same kind of anti-reflection coating on the market, and further analyze the test results.The results show that spectrophotometers and fibre optic spectrometers are equivalent substitutes when testing sunglare filters for double surface reflectance reduction; when testing sunglare filters for single-sided reflectance reduction, the outer surface of the sunglare filters needs to be matted (blackened) before testing if a spectrophotometer is used; if a fibre optic spectrometer is used, the sunglare filters can be tested directly.