The invention discloses a storage battery SOC calculating method based on a multi-energy micro-grid. The storage battery SOC calculating method based on the multi-energy micro-grid is characterized by comprising the following steps that first, the voltage and the current of a storage battery are collected, and the power of the storage battery is acquired; second, whether the storage battery is in a charging state or in a discharging state is judged according to the power of the storage battery; third, when the storage battery is not charged or discharged, an open-circuit voltage method is used for calculating an SOC; fourth, when the storage battery is in the charging state or in the discharging state, an ampere-hour method is used for calculating the SOC, and the calculation result at the preceding moment is used as an ampere-hour method SOC initial value. The open-circuit voltage method and the ampere-hour method are combined, the calculation precision of the SOC of the storage battery is improved, a basis is provided for the charging and discharging control of the storage battery, and deep charging and discharging of the storage battery can be prevented. Accordingly, the service life of the storage battery is prolonged, and safe and economical operation of the micro-grid is guaranteed.