X-ray phase contrast microscopic splicing method and system based on multilayer film Laue lens

The invention discloses an X-ray phase contrast microscopic splicing method and system based on a multilayer film Laue lens, and the system comprises the steps: an X-ray processing module limits the emission angle of an incident X-ray and carries out the pre-focusing, and obtains a pre-focused X-ray; the light source focusing module realizes two-dimensional focusing on the pre-focused X-ray to obtain an X-ray focusing light source; the detector module comprises an absorption grating, a scintillator and an imaging unit, the scintillator is located behind the absorption grating, the X-ray focusing light source is superposed through the absorption grating, the scintillator converts the X-ray focusing light source into a visible light wave band, and a sample image and a background image are formed in the imaging unit; the image acquisition unit acquires a plurality of multi-modal microscopic images, and the image splicing unit performs splicing processing on any two multi-modal microscopic images formed by sample