Automatic vehicle lamp with charging function

The automatic car lamp comprises a box body, a fixing mechanism and a lighting lamp, a sliding groove is formed in the front side of the box body, a sliding block is connected into the sliding groove in a sliding mode, the fixing mechanism comprises a rotating rod, the rotating rod is rotationally connected to the left side of the box body, a rotating disc is fixedly connected to the left side of the rotating rod, and the lighting lamp is arranged on the rotating disc. A pull rod is fixedly connected to the surface of the rotating disc, a two-way threaded rod is fixedly connected to the right side of the rotating rod, a threaded block is connected to the surface of the two-way threaded rod in a threaded mode, and a clamping block is arranged on the outer side of the threaded block. By means of the structure, disassembly and assembly are convenient, the bicycle tail lamp is firmly clamped and fixed to the connecting column of the bicycle, the time for a user to install the bicycle tail lamp is greatly saved, t