A narrow bandpass optical angular filter is proposed based on the band gaps of one-dimensional aniosotropic photonic crystal. The angle photonic band gap structures and the angle defect modes of doped anisotropic stuctures are caculated by the electromagnetic finite element method. Numerical simulations show that there is a strong correlation between the photonic band gap and the incident angle, as well as the defect modes are tunable based on the incident angles. Unique properties of this systems emerging from doped anisotropic strucstures can realize a narrow band angle filtering which can be used as a good optical device in the future.