Traditional optical interference narrow-band-stop filters do not possess wide-angle property, because peaks and troughs of filter spectrum move to short wavelength at non-normal angle of incidence (AOI), which could result in functional failure in particular cases, e.g., blocking of laser for pilot in cockpit during premeditated laser pointer direct. For this reason, we designed a wide-angle metamaterial band-stop filter assembled by cross shaped units to block 532nm green light that can maintain filter spectra at ±35° non-normal AOIs. Unnecessary shift of spectrum caused by AOI change is effectively inhibited, and corresponding mechanism is analysed via accurate near-field calculations.