Overbased calcium sulfonate electrical joint complex grease were prepared using polyalkylene glycol (PAG) and LiBF4, LiNTf2 in situ formed ionic liquids as base oil. The volume resistivity and contact resistance for the electrical joint complex grease were investigated. Its tribological properties were evaluated by a MFTR4000 highspeed reciprocating friction and wear tester, and the worn scar surface was analyzed by high resolution field emission scanning electron microscope. The results show that LiBF4 and LiNTf2 can significantly improve the conductivity of the grease, and the conductivity of LiBF4 is better than that of LiNTf2.During the friction process, LiBF4 can form friction protection film on the friction surface, so it possesses better friction reducing and wear resistance. When the weight of additive LiBF4 is 2%, the performance of the prepared grease is obviously better than that of commercially electrical joint compounded grease,it can be used as a novel electrical joint compounded grease.