The utility model relates to power supply safety devices, in particular to a rat blocking plate special for fast evacuation. The rat blocking plate special for fast evacuation is characterized by being provided with a rectangular rat blocking plate body and an adsorption mechanism, fixing frames are arranged on the two sides of the rat blocking plate respectively, installation holes for being connected with a wall body are formed in the fixing frames, the fixing frames are in hinge connection with the lower end of the rat blocking plate, the upper ends of the fixing frames are provided with the adsorption mechanism and springs, and the upper end of the rat blocking plate is correspondingly provided with magnetic blocks. The adsorption mechanism is provided with a manual control circuit and a fire linkage control circuit in parallel connection, the manual control circuit is formed by series connection of a manual switch and electromagnet, then a return circuit is formed by connecting the manual control circuit and a power supply, the fire linkage control circuit is provided with a relay, a return button and at least two starting buttons, two normally-closed contacts of the relay are connected to the power supply and the manual control circuit respectively, and the starting buttons are in parallel connection. The control contacts of the relay, the return buttons and the starting buttons in parallel connection are in series connection to be connected with the power supply to form the return circuit. The rat blocking plate special for fast evacuation has the advantages that an opening mode is simple and fast, and the rat blocking plate can be in linkage with a fire extinguishing system to eliminate hidden danger in evacuation.