The invention discloses a rapid interface used for protecting an electric power system switch cabinet. The rapid interface comprises a plug and a socket, wherein the plug and the socket are in plugging matching, the plug comprises an upper casing, a pin and an upper locking mechanism, an end surface of the upper casing is provided with a first groove and a third groove, the pin is fixedly connected with the first groove, a side surface of the upper casing is provided with a second groove communicated with the third groove, an elastic segment of the upper locking mechanism is fixedly connectedwith a bottom surface of the second groove, a locking segment of the upper locking mechanism is in sliding matching with the second groove, the socket comprises a lower casing, a plugging sleeve and afixed column, the fixed column is fixedly connected with a foundation casing and is in sliding matching with the third groove, the fixed column is in clamping matching with the locking segment of theupper locking mechanism, the lower casing is provided with a fourth groove corresponding to the pin, the plugging sleeve is fixedly connected with the fourth groove, and the plugging sleeve is in sliding compaction matching with the pin. The rapid interface is advantaged in that mounting and dismounting are convenient, stability is strong, unified standard for switch cabinet relay protection devices in different wiring modes can be realized, and thereby time and force saving and convenient and fast properties are realized.