The signal measuring circuit of coulostatic polarization is described in this paper based on ad622 and ad1674 . the principle and structure of coulostatic monitor controlled by 80c31 microcomputer is also reviewed 介绍了基于ad622和ad1674的恒电量极化信号检测电路的设计,并对以80c31微处理器为控制核心的恒电量腐蚀监测系统的结构进行了阐述。