This article investigates the predictive value of the Fried Frailty Phenotype (FFP), Liver Frailty Index (LFI), and Short Physical Performance Battery (SPPB) for the 2-year all-cause mortality and composite endpoint events (death + decompensation) in liver cirrhosis patients. The study included 277 liver cirrhosis patients and found that the prevalence of frailty assessed by the three tools was 37.2%, 22.4%, and 20.2%, respectively, and the clinical outcomes of the frailty group were significantly worse. ROC analysis showed that FFP was superior to the Child-Pugh score in predicting all-cause mortality (AUC=0.79) and composite endpoints (AUC=0.75) (P<0.05), while LFI and SPPB, although with higher AUC, did not show statistically significant differences. NRI and IDI analysis indicated that combined frailty assessment could significantly improve the risk stratification ability (e.g., NRI for all-cause mortality=0.67, IDI=0.10, P<0.001) when combined with the Child-Pugh score. Calibration curves confirmed the high predictive accuracy of the combined model. The innovation lies in the systematic comparison of the independent predictive efficacy of the three frailty tools and the verification that their combined application with the traditional Child-Pugh score can significantly optimize prognostic assessment, especially FFP, which is recommended to be incorporated into the standard management process for liver cirrhosis. In addition, the LFI combined model has more potential in dynamic monitoring of intervention effects.