The invention relates to a suspension type warning board assembly capable of being mounted in an electrified manner. The suspension type warning board assembly comprises a warning board body, at least one self-locking clamp, a lifting frame and a lifting rod. Each self-locking clamp is mounted on the top of the warning board body and comprises a left clamp plate and a right clamp plate, the middles of the two clamp plates of each self-locking clamp are rotationally connected onto the warning board body by pivotal mechanisms with hinge pins and coil springs, press portions are arranged on the lower portions of the clamp plates, arc-shaped clamping portions are arranged on the upper portions of the clamp plates, a straight slot is formed in one of the clamping portions of each self-locking clamp, the other clamping portion of each self-locking clamp can be clamped in the straight slot of the self-locking clamp, and supporting rods are rotationally connected to the tops of the straight slots; the lifting frame comprises a bottom plate and accommodating grooves, the bottom plate is transversely arranged, and the accommodating grooves are formed in the bottom plate and are matched with the bottom edge of the warning board body; the lifting rod is an insulating rod, the length of the lifting rod can be adjusted, and the top of the lifting rod is connected to the bottom of the bottom plate. The suspension type warning board assembly has the advantages that a suspension type warning board can be mounted in the electrified manner without power interruption or lifting platforms, and the suspension type warning board assembly is simple in integral structure and convenient to mount and is safe and reliable.