A micro rail vehicle and an electromagnetic brake (1) thereof, belonging to the technical field of rail traffic. The electromagnetic brake (1) comprises a magnetic yoke (11), an armature (12), a brake disc (13), a fixed disc (14), a quick release mechanism, and an operating mechanism connected to the quick release mechanism. The quick release mechanism is configured to drive the armature (12) to move toward the yoke (11), so that the brake disc (13) and the armature (12) can be quickly separated and a gap is formed therebetween, thereby quickly releasing the braking state of the electromagnetic brake (1). The operating mechanism is configured to control operation of the quick release mechanism. The electromagnetic brake (1) has the advantage of being suitable for a micro rail vehicle and capable of quickly releasing the electromagnetic brake (1).