Scintillators maintaining prolonged luminescence stability under high-dose irradiation is important for industrial nondestructive testing applications. Consequently， precisely evaluate the irradiation stability carries substantial engineering significance in both predicting scintillator lifespan and deciphering performance degradation mechanisms. CsPbBr₃ perovskite quantum dot （QD） scintillators have garnered significant attentions due to their outstanding properties， including high radiation hardness， strong X-ray stopping power， nanosecond-scale emission time， low-temperature synthesis， and large-area and flexible manufacturing. Here， CsPbBr₃ QD scintillators are fabricated via a solid-phase thermoforming technique. The QDs are uniformly dispersed within a polymer matrix observed by the morphology characterization. When QD weight fraction is 2%， the scintillator exhibits a transparent bright green appearance with an X-ray absorption efficiency of 6%. When the weight fraction increases to 20%， the scintillator turns opaque and bright yellow， with the X-ray absorption efficiency rising to 54%. Moreover， under an X-ray irradiation dose of 10 kGy based on the actual X-ray absorption， the CsPbBr₃ QD scintillator maintains unchanged radioluminescence （RL） spectra. This excellent irradiation stability results from that the shallow defect states introduced by displacement damage and the parasitic electric fields generated by ionization damage have minimal impacts on the radiative recombination luminescence of CsPbBr₃ QDs. This work highlights the potential application of CsPbBr₃ QD scintillators in the long-term X-ray detection.