The invention discloses a linkage type water mist fire extinguishing device which is characterized by consisting of an electric signal generator, a high-pressure gas generator, a pressure release valve, a fire extinguisher pot body, a fire extinguisher, a jetting switch, a base, a pipeline, a pipeline connection piece, a flow guide frame, spraying heads and a linkage device outer box body, wherein the spraying heads of the water mist fire extinguishing device are arrayed in different arrangement modes. The linkage type water mist fire extinguishing device can protect an area range through the pipeline and the multiple spraying heads and can also link the multiple devices to realize a larger protection space. The linkage starting mode of the water mist fire extinguishing device is more favorable for protection and expansion of the protection space and is not limited by the jetting capacity and the jetting area of the device, so that the effect of expanding the protection space can be achieved to the maximum extent, and the unique all-round and all-cover fire extinguishing characteristics of the device can be well realized and developed.