A display panel, crack detection method therefor, and display device. The display panel comprises a display area (100) provided with at least one first data line (101) and at least one second data line (102), and peripheral area (200) surrounding the display area and provided with a first crack detection line, second crack detection line, first detection switch circuit (51), and second detection switch circuit (52); the first crack detection line and second crack detection line are in different functional layers; the first crack detection line has a first end (A) electrically connected to a first test end and a second end (C) electrically connected to first detection switch circuit; the second crack detection line has a first end (B1) electrically connected to a third node (B) that is different from the first end (A) and second end (C), and a second end (A1) electrically connected to second detection switch circuit.