The utility model discloses a grid failure intelligent identification system, which comprises a computer and a failure identification device mutually connected. The failure identification device comprises a microprocessor; a communication interface and an analog-to-digital converter respectively connected with the microprocessor; a first filter amplifying circuit, a second filter amplifying circuit and a zero-crossing detection circuit respectively connected with the analog-to-digital converter; a current transformer connected with the first filter amplifying circuit; and a voltage transformer connected with the second filter amplifying circuit. The zero-crossing detection circuit is respectively connected with the first filter amplifying circuit and the second filter amplifying circuit. The communication interface is connected with the computer. With the grid failure intelligent identification system, electric quantity information of failure points can be automatically detected, and through analysis of the electric quantity information, the type and the severity level of the failure can be identified, thereby greatly enhancing the maintenance efficiency.