In the ICF experiments, spectrum of X-ray includes a lot of information. Multilayer spectrometer, an X-ray energy spectrometer with high resolution, is composed of multilayer mirrors with different period thickness, some suitable filters and X-ray detectors (XRD). In this paper, a multilayer spectrometer is developed, which will be applied in ICF experiments. The specifications are as follows: Energy range: 100~1500 eV; Channel number: 8; Vacuum degree: 3E–3Pa. The project was proposed on the base of design demand. Then the model was set up and analyzed. This multilayer spectrometer is the most advanced domestic model, and it is very different from the overseas ones.