The invention relates to an intelligent management system of an electric automobile lead-acid battery. The intelligent management system comprises a central processing unit, a sampling module, a CAN (Controller Area Network) communication module and a control module, wherein the central processing unit is used for collecting a sampling signal of the sampling module to carry out calculation, monitoring battery and system states in real time, transmitting the received signal and a calculation result to the CAN communication module in real time and outputting the calculation result to the control module; the sampling module is used for sampling voltage, temperatures and current signals of the lead-acid battery; the CAN communication module is in communication connection with a charger and a whole vehicle system through a CAN bus; and the central processing unit is respectively connected with the sampling module, the CAN communication module and the control module in a communication manner. The intelligent management system of the electric automobile lead-acid battery effectively solves the management and maintenance problems of the lead-acid battery and can accurately estimate a battery state through detecting analog quantities including the voltage, current, the temperatures and the like of the lead-acid battery, so that the battery can be effectively protected, the ageing of the battery is delayed, and the service life of the battery is sufficiently prolonged.