Line lamp with stable structure for bridge

The utility model relates to the technical field of line lamps, in particular to a line lamp with a stable structure for a bridge, which comprises a line lamp, support frames are fixedly connected to the left and right sides of the lower end of the line lamp, a fixing box is slidably connected to the outer side of the line lamp, and fixing rods are fixedly connected to the left and right sides of the lower end of the inner side of the fixing box. According to the utility model, through the arrangement of the fixing box, the torsion spring, the limiting plate and the screw, the limiting plate is rotated, the line lamp of the supporting frame is inserted into the fixing box from top to bottom, the limiting plate penetrates through the limiting groove, and at the moment, the line lamp can be inserted into the fixing box under the condition that the limiting plate is not stressed; the torsion spring drives the limiting plate to rotate in the supporting frame, so that the supporting frame drives the line lamp to b