Double-layer concealed fire hydrant box

The utility model discloses a double-layer concealed fire hydrant cabinet, which comprises a fixed frame, the inner wall of the fixed frame is fixedly connected with a fire hydrant cabinet body, a mounting plate is arranged in the fire hydrant cabinet body, during mounting, a fire extinguisher is placed at the top of the mounting plate, a vertical shaft is rotated to enable a first bevel gear to rotate, and a limiting ring rotates to enable a torsion spring to deform; a first bevel gear drives a movable clamping plate to move to push the fire extinguisher, so that the fire extinguisher abuts against a fixed clamping plate, a rubber block and a clamping block both enter an annular groove, an inserting rod is pushed to penetrate through a through hole to fix a vertical shaft, and a convex block enters a groove, so that the fire extinguisher is mounted and fixed, and the fire extinguisher is prevented from toppling over; when the fire extinguisher needs to be taken in an emergency, the fire extinguisher can be t