Abstract: The cumulative error in the estimation for state of charge (SOC) of large capacity lithium ion batteries for the emergency refuge facilities in coal mine is very large. Aim at this problem, SOC correction estimation scheme of standby lithium battery power supply under this special condition for mine emergency facilities is proposed. A SOC estimation method is designed in this paper, which is based on the ampere hour integration method with temperature, life correction. Experiments prove that the estimation method can achieve obvious correction effect under given experimental conditions, and is fully compliant with lithium battery power supply emergency facilities.