Objective To systematically investigate biomechanical characteristics of One-Finger Zen Push Method applied at the Fengchi acupoint under different force conditions, in order to provide precise quantitative data and enhance the treatment efficacy. Methods Ten senior Tuina practitioners were recruited. The German Novel Pliance-X 32 Expert dynamic pressure distribution system was used to record the mechanical parameters during the application of One-Finger Zen Push Method at the Fengchi acupoint under three force intensities: light, medium, and heavy, for 3 minutes. Data from the stable 1-minute segment of the mechanical output was selected for data analysis, and key biomechanical parameters such as the maximum force, average force, peak pressure, mean pressure, force-time integral (FTI), pressure-time integral (PTI), and operational frequency were evaluated. Results Under light, medium, and heavy force conditions, the mean maximum force applied by senior Tuina practitioners at the Fengchi acupoint were 6.31, 9.45, and 18.27 N, respectively, while the mean force were 3.31, 5.64, and 9.05 N, respectively. The mean peak pressures were 26.10, 34.80, and 70.00 kPa, while the mean pressures were 11.95, 21.00, and 26.15 kPa, respectively. The mean FTIs were 55.65, 182.10 , and 225.21 N·s, and the mean PTIs were 167.10, 489.59, and 795.83 kPa·s, respectively. The mean operational frequencies were 156.00, 150.60, and 154.80 times/min, respectively. Conclusions Ten senior Tuina practitioners showed a high degree of consistency between their subjective definitions of light, medium, and heavy force and the objectively measured mechanical parameters. This reflected their precise control over the applied force under different force conditions, verifying the practicality and reproducibility of the One-Finger Zen Push method in clinical applications. This study provides a reliable basis for quantitative research and development of standardized clinical operation guidelines.