A device for detection of a display panel is provided in the embodiments of the disclosure, which is configured to detect signal lines on the display panel. The signal lines at least comprises a plurality of data lines which are divided into N groups; the device comprises: N shorting bars provided within an electrode lead region of the display panel to intersect the plurality of data lines, a plurality of welding pads provided on both sides of the electrode lead region, each of which shorting bars short-circuits one of the N groups of data lines together and connects with two welding pad at both ends thereof respectively, and a switch which is provided between each of the shorting bars and each of the corresponding welding pads connecting with the former on one and the same side of all the shorting bars; and N is a positive integer not less than.