Firstly, epoxidized eucommia ulmoides gum (EEUG) with different epoxy content was prepared, and filler-free compound formula was used for vulcanization. The effects of epoxy content on the vulcanization characteristics, crystal structure, static and dynamic mechanical properties of IR/EEUG blends were studied. DSC, POM and AFM were used to analyze the aggregated structure of EEUG, the crystal structure and phase structure of IR/EEUG. The results show that the critical epoxy content of EEUG from crystalline structure to amorphous structure is 21.0 mol%. Tiny crystals were observed in 90IR/10EEUG-14.3 vulcanizate. As the dosage of EEUG-14.3 increases, the tensile strength and elongation at break of IR/EEUG-14.3 decrease. With epoxy content increasing, the tensile strength and elongation at break of 90IR/10EEUG increase, and 90IR/10EEUG-21.0 shows the optimum tensile properties. EEUG-21.0 is in the critical state of transformation from crystalline structure to amorphous structure, which is prone to strain induced crystallization. Moreover, the entanglement between EEUG and IR molecules can induce IR strain induced crystallization. The existence of EEUG increased the tanδ at 0℃and reduced tanδ at 60 ℃ of IR vulcanizate, indicating that EEUG with appropriate epoxy content can improve the wet skid resistance and rolling resistance of IR at the same time.