Vehicle-mounted video monitoring device convenient to mount and dismount

The utility model discloses a vehicle-mounted video monitoring device convenient to install and disassemble, which comprises a shell, a threaded cap, groove plates and installation rods, the outer wall of the shell is in threaded connection with the threaded cap, the upper side and the lower side of the shell are fixedly connected with the groove plates, the installation rods are in clearance fit with the interior of the shell, and clamping mechanisms are installed in the groove plates. According to the vehicle-mounted video monitoring device convenient to mount and dismount, through cooperative use of a top plate, a connecting pin, a nut, a clamping plate, rubber plates and the like, after the top plate drives the connecting pin to move and the two rubber plates clamp a monitor, the nut is used for fixing the connecting pin, and then monitors of different sizes are mounted; through cooperative use of a vertical rod, a sleeve, a guide rod, a connecting plate, a plug pin and the like, the vertical rod drives t