In order to reduce the diffracted spectrum shift of the holographic wave-guided display systems within the entire field of view,the optimum slant angle of grating vector and the optimum slant angle of the image source optical axis relative to the volume grating were used.To get the same diffraction spectrum range in the given incident angular range,one-layer volume holographic grating was recorded based on three-step exposure.The numerical simulation shows that：The wavelength ranges of diffracted light are kept the same with the incident angular at －3° to 3° when the spectrum of light source is in the range of 524 nm to 540 nm.The uniformity of the diffraction spectrum range is improved,and this design can be used in holographic waveguide display systems.