Using an ultrasonic lubrication mechanism and extrusion-film effect, a new piezoelectric ultrasonic tactile-display analysis model is proposed and theoretically and experiment allyanalyzed. Using a high extrusion number, the analytical expression of extrusion pressure was derived.A vibration-characteristic experiment was conducted on the ultrasonic tactile-display analysis model and a qualitative and quantitative friction-discrimination experiment was carried out.The influence of the vibration frequency and excitation voltage on friction reduction was explored and the significant friction-reduction effect of the piezoelectric ultrasonic tactile-display analysis model was verified. This provides a theoretical basis for constructing a tactile-display shear-force model.