Capacitor explosion-proof block

The invention provides a capacitor explosion-proof block which includes an explosion-proof block body. An installation cavity is arranged in the upper end face of the explosion-proof block body. Annular slots are symmetrically arranged at the bottom of the installation cavity. A wiring hole is arranged in each annular slot, and the wiring holes penetrate the explosion-proof block body. Through holes are respectively arranged in the two sidewalls of the installation cavity. A groove is also arranged in the upper end face of the explosion-proof block body. A first reinforcing rib, a second reinforcing rib, a third reinforcing rib and a stopper are arranged on the lower end face of the explosion-proof block body. The second reinforcing rib and the third reinforcing rib are placed in parallel.One end of the second reinforcing rib and one end of the third reinforcing rib on the same side are connected with the stopper. The first reinforcing rib is arranged at the other ends of the second reinforcing rib and the th