Abstract: The present disclosure provides a method for calculating a remaining capacity of a power battery pack, which comprises steps of: (1) performing charging and discharging tests on a power battery pack provided with a battery management system with a charge-discharge machine; (2) reading CBench—c and CBench—d of the charge-discharge machine and reading CBMS—c and CBMS—d of the battery management system; (3) determining a charging correction coefficient Kc and a discharging correction coefficient Kd, K c = C Bench_c C BMS_c , K d = C Bench_d C BMS_d ; ( 4 ) determining a remaining capacity of the power battery pack: when the power battery pack is in a charged state, a variation of capacity ?Cc of the power battery pack is ?Cc=Kc×I×?t, the remaining capacity Ct of the power battery pack is Ct=C0+?Cc; when the power battery pack is in a discharged state, a variation of capacity ?Cd of the power battery pack is ?Cd=Kd×I×?t, the remaining capacity Ct of the power battery pack i