To fill the vacancy of domestic short focal range digital movie zoom projection lens and to meet the requirement of the market, a digital movie zoom projection lens for 0.65 inch DLP 1.3 K digital movie projector was designed by the mechanical compensation method. It includes the former fixed group, the zoom group, the compensation group and the last fixed group. It is composed of ten glass sphere lenses, and the zoom group is composed of one negative lens, the compensation group is composed of two doublet lenses. The total length of the digital movie zoom projection lens is 170 mm, the full aperture is 70 mm. Its focal length range is 14.5～18.2 mm, F-number is 2, projection ratio range is 0.99∶1～1.23∶1, and the BFL is 32.6 mm. The cam curves were designed with the method of equal interval zoom. The image quality in each focal length is excellent with advantages of simple structure, small size, and low cost, and its cam curves are smooth without cam inflexions and processed easily.