The invention provides a dual-power uninterruptible ultra-fast switching device. The device includes a shell body, a drive rod, an electromagnetic drive mechanism placed in the shell body and a force keeping mechanism; the drive rod glidingly crosses through the shell body, and a first end of the drive rod is used for connecting with a dynamic contact of a main power on-off device, and a second end of the drive rod is used for connecting with a dynamic contact of a standby power on-off device; the electromagnetic drive mechanism is connected with the drive rod and used for generating electromagnetic force after charging current; the electromagnetic force drives the drive rod to move towards the main power on-off device and the standby power on-off device, so that the dynamic contact end and the static contact end of the main power on-off device or the standby power on-off device are contacted to each other; the force keeping mechanism is connected with the drive rod, and used for applying the keeping force to the drive rod so that the dynamic contact end and the static contact end of the main power on-off device and the standby power on-off device are under the contact state. The dual-power uninterruptible ultra-fast switching device can largely shorten the switching time; the utilization rate of the electromagnetic energy is high, the decay rate of the electromagnetic force is slow, and the movement route is long.