A display panel and a cutting method therefor, and a display device. The cutting method comprises: using a first laser to cut a mother board (01) to be cut into multiple independent display panels (101), wherein the display panels (101) comprise multiple leads (20); and using a second laser to at least cut off a short circuited lead (20) at a cutting location, close to the first laser, on the display panels (101), wherein a cutting direction of the second laser is perpendicular to an extension direction of the lead (20). Also provided are a display panel, and a display device comprising the display panel. By means of the cutting method, the short circuit problem of an edge lead caused on a display panel by high-temperature hot melting by a laser after mother board cutting can be improved, and the product yield after cutting is improved. By means of the display panel and the display device, detection of electrical performance can be facilitated, improving the efficiency of lead connection.