To diagnose the presence of electron beams in Z-pinch plasma in spectral range of 0.2-2 nm,two channel X-ray spectrometers respectively using have desirable properties for applications requiring broad spectral coverage,good spectral resolution,and minimized source broadening. A new space resolved focusing elliptical curved crystal spectrometer has been developed and applied to diagnose X-ray of Z-pinch plasma based on focusing spectrograph spatial resolution (FSSR). An elliptical PET(002)crystal was employed with 1348 mm focal length,0.9480 eccentricity and 30°-67.5° Bragg angle. The first experiment was carried out on the Yang accelerator and aimed to investigate the characteristics of high-density plasma and the second did with the spectrometer rotated 90°. X-ray spectra in an absolute intensity scale were obtained from Au-wire Z-pinch plasmas recorded by half-circle X-ray film with radius of 50 mm. It was demonstrated experimentally that the two measured wavelength were same,with spectral resolution λ/Δλ of 300-600,and that spectrograph of elliptically bent PET crystal was a good tool for diagnosing Z-pinch plasmas.