This article prospectively analyzes the prognostic scores and dynamic changes of key clinical indicators in 154 patients with non-cirrhotic HBV-related chronic-onset acute liver failure (HBV-ACLF) during the 1st to 28th day of the disease course. According to the 1-year outcome, the patients are divided into death/liver transplantation group, cirrhosis group, and non-cirrhosis group, and the differences in longitudinal trajectories of patients with different outcomes are discussed. The study found that the death or liver transplantation group showed a continuous increase in TBil and INR (>400 μmol/L, >2.5), and a decrease in PLT below 100×10⁹/L, while the patients who survived and did not progress to cirrhosis showed rapid improvement in indicators; the cirrhosis group showed a recovery trend, but still had TBil>200 μmol/L, INR>1.5, and PLT<100×10⁹/L at 28 days. The innovation lies in the first systematic depiction of the dynamic evolution trajectory of non-cirrhotic HBV-ACLF patients with different prognoses, breaking through the limitations of traditional single-time point evaluation, using linear mixed-effects models to analyze the interaction between time and groups, and revealing the change patterns of key indicators within 28 days can effectively predict long-term outcomes. In addition, the study emphasizes the importance of dynamic monitoring of MELD, CLIF-C ACLF and other scores, as well as indicators such as TBil, INR, PLT, AFP, and blood sodium for individualized prognostic evaluation and clinical intervention, providing a basis for the subsequent establishment of dynamic risk stratification models.