Display device and detection method thereof

The invention provides a display device and a detection method of the display device, and relates to the technical field of display. A display panel can be detected rapidly, and therefore production efficiency is improved effectively. The display device comprises the display panel and an external surrounding wire located on the periphery of the display panel. The external surrounding wire comprises a first end, a second end and a detecting coil located between the first end and the second end. The display device further comprises a test module connected with the first end and the second end, and is used for manufacturing and detection of the display panel.