The invention relates to a double-redundancy hot backup actuator electromagnetic-lock locking, unlocking and monitoring circuit. The circuit comprises a DSP controller and an actuator electromagnetic-lock, and the unlocking, locking and monitoring circuit comprises two controlling circuits, two locking and unlocking circuits, two voltage monitoring circuits and two current monitoring circuits. Thetwo locking and unlocking circuits work in a double-redundancy hot backup mode, and when electromagnetic-lock unlocking fails in one locking and unlocking circuit, the other locking and unlocking circuit can independently realize the locking and unlocking of the electromagnetic-lock, and the reliability of unlocking and locking is thus improved; and the monitoring circuit can realize locking-unlocking state checking and circuit health state evaluation and then transmits state information and circuit health state evaluation to a remote main control station. The double-redundancy hot backup actuator electromagnetic-lock locking, unlocking and monitoring circuit has an isolation function, a second optical coupler, a fourth optical coupler and a third power supply module can achieve control and detection of a locking mechanism and effective isolation of the locking mechanism; and when the electromagnetic-lock breaks down, a load can be isolated from a power supply, and more serious consequences are thus avoided.