In order to solve the problems of vibration of the Multi-pole structure that is very common in engineering, the concept that phononic crystal has unique vibration band gaps is introduced and Phononic Crystals Bragg T rod (PCT) is constructed. Based on the wave equation, the theoretical derivation and numerical calculation that about characteristics of the in-plane and out-of-plane vibration band gap of PCT is carried on by transfer matrix method. The results show that the transformation of the form of elastic waves in PCT makes band gaps responding to various waveforms contribute to vibration suppression, hence, the vibration reduction frequency bands are widened. Excitation of vibration in any direction also can be attenuated. Thus PCT is a kind of good damping elements which meet the demand of multidimensional broadband vibration in engineering.