The invention relates to the technical field of battery management, and discloses a method of estimating a SOC (State of Charge) of a battery and a computer readable storage medium. The method comprises the following steps: whether the battery enters a charging tail end is judged; in a condition in which the battery is judged to enter the charging tail end, according to the detected battery current I, the battery voltage V and a pre-stored corresponding relationship among the battery voltage V, the current I and the SOC value under different multiplying factors, the SOC value of the battery is estimated. The precision of the SOC value of the battery estimated in the method is greatly improved, and the phenomenon that the battery is damaged due to overcharge can be prevented.