The utility model relates to a gas extinguisher, in particular to a cabinet-type heptafluoropropane gas extinguisher. At present, most gas extinguishers have the problems of poor sealing, frequent leakage of an extinguishing agent, troublesome equipment installation, serious vibration during spraying for extinguishment and the like, and the usability and the service life of the gas extinguishers are seriously influenced. The cabinet-type heptafluoropropane gas extinguisher comprises an extinguishing agent storage bottle group, a connecting pipe, a nozzle and a box body part, wherein a container valve is arranged on the extinguishing agent storage bottle group and is provided with a starting electromagnet; one end of the connecting pipe is connected to an outlet of the container valve while the other end of the connecting pipe is provided with the nozzle; the connecting pipe is also provided with a signal feedback device; a hoop is fixed in the box body, two ends of a pull rod are connected with the hoop, and the extinguishing agent storage bottle group is arranged in a fixed ring formed by the hoop and the pull rod. The cabinet-type heptafluoropropane gas extinguisher has the advantages that the leakage of the extinguishing agent is alleviated, and the service life of the extinguisher is prolonged.