Abstract：Objective：Assuming that the output force of the operators is appropriate，the relationship between the mechanical characteristics of the manipulation of fixed- point pressing method on posterior extension in lower limbs and the basic data of the patients is studied to provide a basis for the standardization， normalization， inheritance and promotion of LIN's bone setting manipulation. Methods： The multi-point film pressure test system was used to collect the mechanical data of the operators(gender， age，body mass index(BMI)，course of disease and other basic information) during the treatment process of fixed- point pressing method on posterior extension in lower limbs， and the mechanical characteristic parameters were statistically analyzed. The multiple regression analysis was carried out with the basic data of the patients. Results：The standard preloading force of manipulation of fixed-point pressing method on posterior extension in lower limbs should be 120 to 150 N， and the standard maximum force should be 350 to 410 N. The exerting force for male should be larger than female. Both the preloading force and the standard maximum force is positively correlated with age， negatively correlated with BMI and course of disease. Conclusion：This trial revealed the partial relationship between the exerting force of the operators and the basic information of patients by means of data and multiple regression analysis， providing experimental or mechanical basis for the standardization and normalization of manipulation of fixed- point pressing method on posterior extension in lower limbs， and also suggesting that the operators should adjust the exerting force according to the gender， age， BMI， course of disease and other different conditions of patients.