Protection mechanism matched with security monitor

The invention discloses a protection mechanism matched with a security monitor, the protection mechanism comprises a mounting bracket and a protection device mounted at the upper end of the mounting bracket, the protection device comprises an outer sleeve shell and an inner sleeve shell, and the lower surface of the outer sleeve shell is detachably connected with the upper end of the mounting bracket. An air layer is formed between the two layers of shells through the design of the double protective shells and the double hollow design, the efficiency of heat transfer inside and outside the shells is reduced, the overall thickness and strength of the shells can be increased, and therefore the structural stability and durability of the product are improved; sealing assembly of the camera module and the front side plate at the front end can be guaranteed, a more adaptive effect is provided for the whole security monitoring assembly, the security monitoring assembly is prevented from being affected by the externa