Universal bracket mounting and fixing device of network cabinet

The utility model provides a universal support mounting and fixing device for a network cabinet, which belongs to the technical field of cabinet mounting and is characterized by comprising a first plug board and a second plug board, the first plug board is slidably connected with the second plug board, the first plug board is provided with a first outer side board, and the second plug board is provided with a second outer side board. The first outer side plate is provided with a USB jack, the USB jack is arranged corresponding to the plug-in groove, the second plug board comprises a second outer side plate, a second bottom plate and a second inner side plate, the second outer side plate, the second bottom plate and the second inner side plate form a second U-shaped groove, the second bottom plate is provided with a through hole, the second U-shaped groove is internally provided with a damping assembly, the damping assembly comprises a spring and an elastic piece, and the spring is arranged in the second U-sha