In recent years, micro-columnar cesium iodide (CsI) scintillation films remain a highly desirable sensor for digital X-ray imaging due to its superior spatial resolution, bright emission, high absorption efficiency and ready availability. The micro-columnar structure of the CsI scintillation films can reduce the lateral diffusion of scintillation light and greatly constrain the transmission behavior of fluorescence. However, CsI scintillation films exposed to humid air are easily deliquescent and damaged. In this paper, the preparation methods and anti-deliquescence measures of CsI scintillation films in recent years are mainly summarized and their respective characteristics and limitations are also comprehensively compared and analyzed, which can provide a reference for the preparation and application of high-performance CsI columnar microcrystalline scintillation films in the future.