The present invention relates to one kind of coaxial leakage with outer conductor possessing both normal and reverse E-shaped radiation grooves and its making process. The copper belt used as the outer conductor is punched to form normal and reverse E-shaped periodical radiation grooves, and the copper belt is coated longitudinally to form coaxial leakage outer conductor. The coaxial leakage outer conductor has inner conductor with corresponding size, physically foamed polyethylene insulator layer and protective polyethylene layer. The coaxial leakage comprising the normal and reverse E-shaped radiation groove outer conductor has very small variation range of coupling loss to high speed moving antenna and thus high practical application value.