Objective In this study the force were estimated through numerical calculation and experiment measurement while the connector was well fixed to the humerus. The results can be applied for the optimization of the memory-compressive-connector and the stress analysis. Methods The Mohr Theory was applied to calculate the pressure range between connectors and humerus. The selective prescale pressure sensitive film was then applied to measure the contact pressure in the experiment. Results The calculation showed that the force was 24N when the strain reached maximum. The maximum value was 22.68N in the experiment measurement. So the calculation result was close to the experimental value. Conclusion The prescale sensitive film is sensitive enough to measure the contact pressure. The loads can be confirmed according to the level of the colors. It is convenient for operations to apply the prescale sensitive film. The value through calculation is close to the experimental result. This demonstrated that the calculation and experiment procedures are applicable.