In order to improve the wear resistance of elastic metallic-plastic thrust bearing pad, micro-assembling PTFE/Al_2O_3 multi-layer film was developed by alternating radio frequency(RF) magnetron sputtering PTFE and Al_2O_3 targets. For enhancing the adhesion of the interfaces between PTFE and Al_2O_3 film, N~+ implantation was employed. The structure, mechanical and micro-tribological properties were studied by XPS, X-ray photoelectron spectrometer and atomic force and friction force microscope (AFM/FFM). The results show that the multi-layer consists of Al_2O_3 component and crystalline PTFE. The hardness of the multi-layer modified by ion implantation is less than that of Al_2O_3,but its toughness is greatly improved. The friction coefficient of PTFE/ Al_2O_3 multi-layer modified by ion implantation is much lower than that of Al_2O_3 film, and its resistance to wear is much greater than that of PTFE film. Therefore the wear resistance of elastic metallic-plastic thrust bearing pad is greatly improved. In order to improve the wear resistance of elastic metallic-plastic thrust bearing pad, micro-assembling PTFE / Al 2 O 3 multi-layer film was developed by alternating radio frequency (RF) magnetron sputtering PTFE and Al 2 O 3 targets. The structure, mechanical and micro-tribological properties were studied by XPS, X-ray photoelectron spectrometer and atomic force and friction force microscope (AFM / FFM). The results show that the multi -layer consists of Al 2 O 3 component and crystalline PTFE. The hardness of the multi-layer modified by ion implantation is less than that of Al 2 O 3, but its toughness is greatly improved. The friction coefficient of PTFE / Al 2 O 3 multi-layer modified by ion implantation is much lower than that of Al_2O_3 film, and its resistance to wear is much greater than that of PTFE film. Therefore the wear resistance of elastic metallic-plastic thrust bearing pad is greatly improved.