EPDM composites by intercalation are usually used as the sealing materials of especial containers because of its excellent aging and sealing properties.The shock-resistance of low temperature of EPDM intercalation composites was studied.By using the seal structure containing O-ring,the sealing properties of the O-ring of EPDM intercalation composites in low temperature were studied by means of pressure observation of mechanical seal.The result shows that impact times of low temperature has no obvious effect on the hardness and elasticity of EPDM,and the sealing rings of EPDM/OMMT intercalation composites have excellent sealing properties of low temperature at not more than -60 ℃.