Abstract: In Z-pinch diagnostic, Dante spectrometer plays an important role in the measurement of soft X-ray spectrum and total flux. This paper reports on the structure and channel configuration of a “Dante” spectrometer designed for z-pinch experiments on Yang accelerator. Calibration of X-ray devices used in the spectrometer, such as X-ray diodes, grazing incidence mirrors and filters are described in detail and reasons accounting for the deviation from theoretical values have also been discussed. Waveforms and unfolding results which also compared with X-ray scintillator powermeter obtained in an argon gas-puff experiment are presented as well, the power of X- ray radiation is about 30～40 GW and the energy of it is about 0.8 kJ, the difference of the results of Dante spectrometer and X-ray sc