Metal halide perovskites are emerging scintillator materials in X‐ray detection and imaging. However, the vulnerable structure of perovskites triggers unreliable performance when they are utilized in X‐ray detectors under cumulative dose irradiation. Herein, a self‐limited growth strategy is proposed to construct CsPbBr3 nanocrystals that are embedded in a transparent amorphous network structure, featuring X‐imaging with excellent resolution (≈16.8 lp mm−1), and fast decay time (τ = 27 ns). Interestingly, it is found that the performance degradation of the scintillator, caused by the damage from high‐dose X‐ray irradiation, can be fully recovered after a facile thermal treatment process. This indicates a superior recycling behavior of the explored perovskites scintillator for practical applications. The recoverability of the as‐explored scintillator is attributed to the low atom‐migration rate in the amorphous network with high‐viscosity (1 × 1014 cP). This result highlights the practical settlement of the promising perovskites for long‐term, cost‐effective scintillator devices. A self‐limited growth strategy is proposed to construct CsPbBr3 nanocrystals, which features X‐imaging with excellent resolution (16.8 lp mm−1). More importantly, the blurred X‐ray images of the damaged perovskite NCs, due to irradiation at high dose rate, are well refreshed by a thermal treatment. This discovery broadens the research and application of the scintillators and opens a new chapter.