The reflective spherically bent crystal is investigated based on the Bragg diffraction to diagnose the laser plasma X-ray.The spherically bent quartz crystal and the X-ray imaging plate are used as the X-ray analyzer and the imaging device,respectively.The imaging experiment was carried out at the X-ray diffractometer facility by using Cr target.The monochromatic image of a mesh interval of 0.2 mm×0.2 mm is obtained by the spherically bent crystal.The spherically bent crystal analyzer has high s...