The invention provides a repair circuit of an LCD (Liquid Crystal Display) panel, comprising a data line repair wire, a scanning strip repair wire, a winding wire, a connecting line, a first conducting layer, a second conducting layer and a welding conducting layer, wherein data line repair wire and the scanning strip repair wire are respectively arranged at one ends of a data line and a scanningstrip in the floating, insulation and crossing way; a surround wire surrounds the LCD panel and is arranged at the other ends of the scanning strip and the data line in the floating, insulation and crossing way and is partly overlapped with the scanning strip repair wire in electrical insulation; one end of the connecting line is overlapped with part of the data line repair wire in electrical insulation, and the other end is electrically connected with the first conducting layer; and the welding conducting layer is arranged at the other end of the surround wire and is overlapped with the first conducting layer and the second conducting layer partly in electrical insulation. The repair circuit of an LCD panel can realize repairing capability when power fault occurs to a defect data line ora defect scanning strip and greatly reduce scrappage of products.