Flexible scintillation screen and preparation method thereof, and radioactive ray image sensor

The invention discloses a flexible scintillation screen and a preparation method thereof, and a radiographic image sensor. The preparation method comprises the following steps: providing a rigid substrate, forming a flexible substrate layer, a scintillator layer and a flexible support layer on the rigid substrate in sequence, taking the flexible support layer as a substrate, and separating the flexible substrate layer from the rigid substrate. And stripping the flexible substrate layer, and forming a protective layer on the surface of the scintillator layer and the surface of the flexible supporting layer which are exposed after the flexible substrate layer is stripped. The flexible substrate layer is removed after the rigid substrate is stripped, and the flexible supporting layer which is tightly combined with the scintillator layer is adopted as a supporting structure of the scintillator layer, so that the situation that the yield of products is affected due to the fact that the flexible substrate layer and