To solve defects and deficiencies of the existing ultra wide-angle digital projection lens and match the ultra wide-angle projecting from different types and specs of digital projectors, a type of ultra wide-angle digital universal projection lens composed of nine lenses was designed. The focal length is 8.76 mm, the full field of view reaches 97°, F-number is 2.12, BFL is longer than 34 mm, the largest diameter is less than 96 mm and the total optical length is shorter than 200 mm. By setting an effective even aspheric, the off-axial aberrations and distortion are corrected well. By reducing the number of lens and increasing the relative aperture, illumination is improved. By increasing the aperture coma of the system and reducing the FOV of image, relative illumination is improved up to 97.46%. By determining the prim thickness and adjusting the structure and layout, the lens can match prisms of different effective optical thicknesses from 16.5 mm~23 mm in several kinds of digital projector engines. The resolution is 120 lp/mm, and the absolute value of relative distortion is less than 1.5%. The design indicates that the lens can match digital projectors by using 3LCD and 1DLP technologies with the chip sizes from 0.55 in to 0.76 in, minimum projection ratio is up to 0.53∶1 and the largest frame offset reaches 389 mm. Its image quality is excellent with advantages of simple structure, small size, low cost and mass produced.