In the fields of airborne and satellite-borne, especially for the observation of short-term changes in scientific objectives, remote sensing platforms are increasingly requiring spectrometers to reduce revisit time while achieving high resolution. Based on Offner grating dispersive imaging spectral system, a kind of high-resolution ultraviolet double-slit spectrometer was designed the working wavelength of 250~500nm, each slit length of 50mm, the interval between slits of 37mm and the spectral resolution of 0.3nm. Design and analysis results show that, for this kind of configuration of the double-slit spectrometer, the MTF is more than 0.76 for various wavelengthes and different fields of view, and more than 90% of the encircled energy for centric and edge wavelengths is within one pixel. This kind of configuration has excellent imaging quality close to diffraction limit. Meanwhile, the configuration reduces the system’s revisit time, improves the system’s SNR and ensures the high resolution while reducing the system size and scanning aperture, which is suitable for airborne and satellite-borne remote sensing applications.