In this study, the γ-radiolysis of boric acid-lithium hydroxide-ammonia coolant was investigated under different conditions, including boric acid concentration, absorbed dose, and absorbed dose rate. The concentrations of H₂O₂, NO₂^-, and NO₃^- were determined using UV-visible spectroscopy and ion chromatography. With an increase in boric acid concentration, the concentrations of H₂O₂ and NO₂^- in the coolant system did not change significantly within a pH range commonly used in pressurized water reactor operation. Specifically, the concentration of H₂O₂ varied from 9.28×10^-5 to 1.07×10^-4 mol/L, while that of NO₂^- changed from 0.9×10^-5 to 1.5×10^-5 mol/L. In contrast, the concentration of NO₃^- fluctuated significantly, ranging from 4×10^-5 to 8×10^-5 mol/L. With an increase in the absorbed dose (1-30 kGy), the equilibrium concentration of H₂O₂ and NO₂^- in boric acid-lithium hydroxide-ammonia system increased to 1.28×10^-4 mol/L and 1.30×10^-5 mol/L, respectively. Meanwhile, the concentration of NO₃^- did not change significantly (4×10^-5 to 6×10^-5 mol/L). The concentrations of the three radiolytic products were not significantly affected within the given absorbed dose rate range (1.27 to 18.86 Gy/min). Overall, this work provides valuable basic data for optimizing the new boric acid-lithium hydroxide-ammonia coolant system.