To expand frequency bands of PEG and collect energy from a plurality of vibration power effectively, a circumference array of twodimensional varying crosssection PEG was presented.The output performance of the array in different methods including direct serial/parallelconnection and connection with rectifiers was analyzed.The research results show that, compared to the traditional array form of additional mass block structure,the resonant frequency of circumference array of twodimensional varying crosssection PEG is more sensitive to the structural changes,which means that with the same constraints of work space, and the circumference array can achieve a wider work band.Meanwhile,the two dimensions optimized PEG can be designed without changing of resonant frequency,which is important to the microelectronic systems working in the small and irregular space.