The utility model discloses a device for preventing override trip of a station transformer by combining current quick-break and zero-sequence protection. The device comprises a low-voltage circuit breaker and a zero-sequence current protection device, the low-voltage circuit breaker is provided with over-current protection and no-voltage protection, and the zero-sequence current protection deviceis composed of a zero-sequence current transformer, an over-current relay, a time-delay relay and a shunt excitation coil. The beneficial effects of the utility model are that: the utility model discloses: the beneficial effect is: Current quick-break protection and zero-sequence protection can be combined, the advantage that current quick-break protection is simple and reliable is brought into play, the device has the characteristics of sensitivity and quickness of zero-sequence protection, the device is used for power utilization protection of a low-voltage power distribution network and a transformer substation, the capability of correctly and timely cutting off a fault area can be improved, and override trip accidents are avoided.