Automatic fire extinguishing device for power distribution cabinet

The utility model provides an automatic fire extinguishing device for a power distribution cabinet, which comprises a cabinet body, a high-voltage power distribution cavity and a low-voltage power distribution cavity are respectively arranged in the cabinet body, an assembly frame is assembled in the high-voltage power distribution cavity, and expansion components connected with the high-voltage power distribution cavity are mounted on two sides of the assembly frame in a butt joint manner. A guide groove is formed in the assembling frame, a plurality of adjustable movable assemblies are slidably installed in the guide groove, fire extinguishing assemblies are movably installed on the adjustable movable assemblies, and clamping assemblies are fixedly installed at the bottoms of the adjustable movable assemblies. According to the utility model, the device and the cabinet body can be quickly assembled and disassembled by using the expansion assembly on the assembly frame, and personnel can directly assemble the