Aluminum magnesium alloy intermediate joint protective shell

The utility model discloses an aluminum magnesium alloy intermediate joint protective shell, and belongs to the field of cable joint boxes. An aluminum magnesium alloy intermediate joint protection shell comprises a shell body, threading ports are formed in the two sides of the shell body, pressure relief windows are symmetrically arranged on the side walls of the shell body, and energy relief pipes are fixedly connected to the side walls of the threading ports; through the arrangement of the energy release pipe, the energy release sliding block, the limiting ring, the sliding base, the first magnetic plate, the cutting blade and the fire extinguishing air bag, energy release can be rapidly conducted on the interior of the shell when the cable connector in the shell explodes and burns, damage to other cables or the surrounding environment is effectively prevented, the first magnetic plate is dragged through the pull rope, and the fire extinguishing effect is achieved. The cutting blade and the first magnetic