A new space and time resolved focusing elliptical curved crystal spectrometer has been developed and applied to diagnose X-ray of laser-produced plasma in 0.2～2 nm region. Twin channels collocated symmetrically are utilized for simultaneous measurement of space and time resolved spectra. The design parameters of the spectrometer are presented, a novel aligning method is adopted, and the error due to off-axis of source is analyzed. The spectrometer has been calibrated for experiment on Shengguang-Ⅱ target chamber in Shanghai. Photographs of spectra have been recorded by using X-ray CCD camera. It is demonstrated experimentally that the measured wavelength is accorded with the theoretical value.