Communication cabinet with good heat insulation effect

The utility model relates to the technical field of outdoor communication cabinets, and discloses a communication cabinet with a good heat insulation effect, which comprises a cabinet body, bosses are fixedly connected to the periphery of the top of the cabinet body, extension rods are fixedly connected to the two ends of each boss, a protective shell is rotatably connected to the surface of each extension rod, a mounting groove is formed in the surface of each protective shell, and the mounting grooves are fixedly connected to the periphery of the top of the cabinet body. And a heat insulation plate is slidably connected into the mounting groove. According to the communication cabinet with the good heat insulation effect, a heat insulation plate is placed in a mounting groove, after the heat insulation plate is placed at a proper position, a first transmission plate is moved to drive a first limiting rod, so that the first limiting rod is inserted into a limiting hole, the heat insulation plate is fixed, and