The invention provides a storage battery charging and discharging control method based on a full bridge isolation two-way converter. According to the method, during the charging, firstly, four kinds of work states are set, the switch frequency f is X2kHz in the maximum power charging state, the switch frequency f is X2kHz in the constant current charging state, the switch frequency f is X1kHz in the constant current charging state, and the switch frequency f is X1kHz in the constant voltage charging state, wherein X2 is smaller than X1. The converter collects the SOC (state of charge) of a storage battery, then, the entering of corresponding work state is judged according to the SOC, and when the SOC of the storage battery is 1, or machine halt instructions exist, the converter stops working. When the storage battery discharges, firstly, three kinds of work states are set, the switch frequency f is X2kHz in the maximum power discharging state, the switch frequency f is X2kHz in the constant power discharging state, and the switch frequency f is X1kHz in the constant power discharging state, wherein X2 is smaller than X1. The converter collects the SOC of the storage battery and judges whether the storage battery can discharge or not, then, the entering of corresponding work state is judged according to the reference output power, and when the SOC is smaller than the set value, or the machine halt instructions exist, the converter stops working.