An integrated order blocking filter covering the wavelength range from 0.4μm to 25μm was designed and fabricated for the hyperspectral imaging system. Based on the characteristics of the reflective Offner convex grating dispersion, the optical substrate is divided into three areas with different working band to block the high-level spectra. The optical transmittance efficiency of each band is higher than 93%. Fine mask technique was adopted to ensure the size of adjacent area between different band less than 30 μm. The spectra utilization efficiency is improved effectively.