The invention relates to the technical field of school supplies, and in particular to an automatic light supplementing desk. The automatic light supplementing desk comprises a desk body, wherein illuminating lamps and an automatic control device are arranged on the desk body; the automatic control device comprises a light intensity sensor, an A/D conversion module, a central processing unit, a memory module, a display module, a triode driving module and a power module; the light intensity sensor is connected to the central processing unit via the A/D conversion module; the memory module and the display module are connected to the central processing unit; the central processing unit is connected to the illuminating lamp via the triode driving module; and the power module is used for supplying power to the automatic control device. The automatic light supplementing desk provided by the invention is simple in structure and low in cost, and the automatic light supplementing desk is suitable for promotion and application in schools. The automatic light supplementing desk has an automatic light supplementing function; and a good environment can be provided for learning, so that learningefficiency is improved and student's eye health is protected.