The invention discloses an automatic detection line for a mutual inductor, which belongs to the technical field of detection of low-voltage current mutual inductors, particularly relates to an automatic device for use in the detection process of a low-voltage current transformer, and is used for solving the problem of the realization of full-automatic operation of the detection process of mutual inductors of uniform appearance and uniform specification. The automatic detection line comprises a mechanical device, a detection device and an automatic control device, wherein the detected mutual inductor is arranged on a transmission device through a manipulator device, is moved to a specified position, and is positioned accurately through a tray positioning system; and an industrial computer serving as a core component of the automatic control device is used for controlling the manipulator device, the transmission device, a wiring device, a voltage-withstanding testing device and a comprehensive verification device, and is used for automatically distinguishing unqualified products and finished products by labeling; and the automatic detection line is suitable for detecting low-voltage current transformers on a large scale in a power measuring center.