The work aims to achieve the radar reflection influence regularity of different carbon fiber content coating, and realize controlling of radar reflections properties on fake target. A series of conductive coatings with different carbon fiber mass percent for 0%~20% have been prepared by using carbon fiber powder as conductive filler and acrylic polyurethane as binder. The effect of different carbon fiber content coating for coating surface resistivity and radar reflections property of test piece has been studied, and tested on the PU foam conical modeling. The coating surface resistivity reduced quickly from 2.40×1011 Ω to 1.80×103 Ω，and the RCS increased from -3.07 dBsm to 10.54 dBsm when the carbon fiber mass percent increased from 0% to 4%; the coating surface resistivity has reduced slowly when the carbon fiber mass percent increased to 10%, and the RCS increased to 11.05 dBsm; the coating surface resistivity and RCS showed little change when the carbon fiber mass percent increased continue to 20%. The radar reflections testing results of structure modeling showed that bait RCS was closing between it coated by conductive coating and pasted by aluminum film when the carbon fiber mass percent was 10%. The coating surface resistivity and RCS was effected by the content of carbon fiber, and the best range of carbon fiber mass percent in coating was 4%~10%. In this range, the surface resistivity of coating reduced obviously, the coating showed metallic character，and the radar reflection property was closed to metal.