In order to study the surface topography and oil-resistant property of polyethylene engineering material after fluorination, the topography and surface’s element content of polyethylene engineering material in different fluorine concentration were analyzed with scanning electron microscopy and X-ray energy dispersive spectrometer. It pointes out that it does not pursue the thickness of fluorinated layer excessively without paying attention to the surface’s homogeneity. Moreover, by oil resistant weight loss experiment, it indicates that the higher surface’s fluorine content of polyethylene engineering material has better oil resistant property.