Computer network security monitoring device

The utility model discloses a computer network security monitoring device, which relates to the technical field of security monitoring and comprises a fixing plate, a first mounting block is movably mounted on the outer wall of the fixing plate, and a rotating groove is formed in the side face of the first mounting block. A clamping block on the back face of a first installation block is aligned with a clamping groove to be clamped into the clamping groove, then a two-way threaded rod is rotated to enable a moving block to drive the clamping block to be away from each other in a rotating groove, then the clamping block and the clamping groove are clamped, the first installation block is fixed, and a sliding plate is pushed to drive an inserting rod to enter a second sliding groove. A second mounting block is inserted into a mounting groove in the side face of a fixing plate, sliding plates are loosened, the sliding plates are pushed to be away from each other through the thrust of a second spring, then an ins