Monitoring camera convenient for finely adjusting lens

The utility model relates to a monitoring video camera which is convenient for finely adjusting a lens and comprises a main shell base, a front cover, a supporting frame which is installed in the main shell base, a photographic device which is arranged on the center of the supporting frame and an adjusting device which is located on one side of the photographic device, wherein a hollow-shaped projecting seat which is projected downwards is arranged on the main shell base and the bottom portion of the front cover, a projecting plate part which is located in the projecting seat is also arranged on the circumferential wall of the supporting frame in a projecting mode, two adjusting holes are arranged on the front end of the projecting seat of the front cover, the adjusting device comprises a first fan-shaped gear and a second fan-shaped gear which are fixed with the photographic device, a first adjusting gear and a second adjusting gear which are engaged with the first fan-shaped gear and the second fan-shaped g