Since almost all large die surfaces are free-form surfaces, currently, these are mostlty manually polished. In order to overcome this barrier, floating face polishing is a feasible polishing technology. The polishing force is a key problem of floating polishing technology. This paper tries to study face polishing force on base of analyzing 3D polishing physical model. The paper focuses on the establishment of the model of face polishing force with full friction condition. The research results will be used for the development of a portable, state-of-the-art polishing machine and the optimization of the associated polishing process parameters in the near future.