The invention discloses a pole seal material for lithium ion batteries and a preparation method of the pole seal material for the lithium ion batteries. Fluorous rubber serving as a main matrix and auxiliary materials including auxiliary rubber, conductive filler, processing auxiliary agents, a peroxide vulcanizing agent, an auxiliary cross-linking agent and the like are mixed through an open mixing mill or an internal mixing mill to obtain low-compression-set high-conductivity rubber composite material. Under the condition that low resistance and high electrolyte resistance are guaranteed, consumption of the conductive filler is decreased, and the composite material integrates low compression set and high conductivity. The material has excellent conductivity and compressive deformation characteristics, a volume resistance range is 10<2> omega cm-10<4> omega cm, and high-temperature compressive deformation is 30% or below (150 DEG C*70h). In addition, the material is excellent in physical and mechanical property, heat resistance, ageing resistance and electrolyte resistance and is quite suitable for conductive pole sealing of the lithium ion batteries.