The invention discloses a multi-nozzle fire extinguishing device, and belongs to the technical field of fire fighting equipment. The device comprises a bottle body, a shield, a valve seat, a rupture disk, a valve and a nozzle, the upper half part of the spray head is provided with an upper nozzle and four side nozzles, the upper nozzle is positioned right above the spray head, the side nozzles are uniformly distributed in the circumferential direction of the spray head, the front end surfaces of the upper nozzle and the side nozzles are spherical surfaces, and spray holes are distributed in the spherical surfaces; the lower half part of the spray head is of a cylindrical cavity structure, and a threaded section is machined on the outer circumferential surface of the cylindrical cavity structure; the valve seat is fixedly connected to a bottle opening of the bottle body, the spray head is connected with an internal thread on the valve in a matched mode through a threaded section of the lower half portion of the spray head, the spray head and the protective cover are fixed together through the upper nozzle and the side nozzle, after the protective cover and the bottle body are fixed, the rupture disk is pressed on the upper end face of the valve seat through the valve, and an opening of the bottle body is closed through the rupture disk. The liquid fire extinguishing agent can be gasified or the solid fire extinguishing agent can be quickly atomized and dispersed all around, so that the purposes of extinguishing fire and suppressing explosion are achieved.