Automatic feeder for fish tank

The utility model relates to the technical field of fish tank application, in particular to an automatic feeder for a fish tank, which is characterized in that the bottom end of a feeding mechanism is fixedly connected with a top tray, the side wall of the top tray is rotatably connected with an outer shell, the bottom end of the outer shell is fixedly connected with an annular bottom tray, and the top surface of the annular bottom tray is fixedly connected with a motor I; and one side of the first motor is fixedly connected with a gear, the center of the annular chassis is rotationally connected with a rotating disc, and the top surface of the rotating disc is provided with an annular guide rail. According to the device, the rotating disc is rotationally connected to the center of the annular base plate, the auxiliary mechanism is fixedly connected to the bottom face of the annular base plate, the two auxiliary wheels and the power wheel clamp the side wall of the fish tank, the whole device is fixed to the