Objective: The Fengchi acupoint is commonly used in clinical practice for treating cervical spondylosis, headaches, and dizziness. The One-Finger Zen Push Method applied to this acupoint has demonstrated significant therapeutic effects. However, there is a lack of systematic biomechanical studies quantifying the safe force application conditions. This study aims to systematically investigate the biomechanical characteristics of the One-Finger Zen Push Method at the Fengchi acupoint under varying force conditions, providing precise quantitative data to support the scientific development of Tuina clinical practice and teaching, and to promote the modernization and application of traditional Chinese massage techniques. Methods: Ten Tuina practitioners with senior professional titles were recruited. The German Novel Pliance-X 32 Expert dynamic pressure distribution measurement system was employed to record the mechanical parameters during the execution of the One-Finger Zen Push Method at the Fengchi acupoint under three force intensities: light, medium, and heavy, for 3 minutes each. Data analysis focused on the stable 1-minute segment of the mechanical output, evaluating key mechanical indices such as maximum force, mean force, peak pressure, mean pressure, Force-Time Integral (FTI), Pressure-Time Integral (PTI), and operational frequency. Results: Under light, medium, and heavy force conditions, the mean maximum forces applied by the ten senior practitioners at the Fengchi acupoint were 6.31 N, 9.45 N, and 18.27 N, respectively; the mean forces were 3.31 N, 5.64 N, and 9.05 N, respectively. The mean peak pressures were 26.10 kPa, 34.80 kPa, and 70.00 kPa, while the mean pressures were 11.95 kPa, 21.00 kPa, and 26.15 kPa, respectively. The mean FTIs were 55.65 N*s, 182.10 N*s, and 225.21 N*s, and the mean PTIs were 167.10 kPa*s, 489.59 kPa*s, and 795.83 kPa*s, respectively. The mean operational frequencies were 156.00 times/min, 150.60 times/min, and 154.80 times/min, respectively. Conclusion: The practitioners exhibited a high degree of consistency between their subjective definitions of light, medium, and heavy force and the objectively measured mechanical parameters. This reflects the practitioners" precise control over the applied force under different conditions, validating the method"s practicality and reproducibility in clinical settings. These findings provide a reliable basis for quantitative research and the development of standardized clinical practice guidelines.