In order to improve the speed and efficiency of the electrical power network analyzer,a dual CPU processor based on the last production is designed in this paper,which consists of DSP and AVR singlechip microcomputer.DSP calculates the parameter of electrical network and AVR single-chip microcomputer manages the control and alarm function.The electrical power network analyzer makes full use of dealing with a lot of data and complex arithmetic of DSP,and the interface control of AVR single-chip microcomputer.DSP communicates with single-chip microcomputer through SPI interface.The research results show the electrical power network analyzer is better than last production.