Bridge crack detection device

The utility model relates to the technical field of bridge crack detection, and discloses a bridge crack detection device which comprises a measuring plate, sliding frames are slidably connected to the two sides of the surface of the measuring plate, vertical plates are fixedly installed on one sides of the top faces of the sliding frames, a binding belt is fixedly installed on the back face of one of the vertical plates, and the binding belt is fixedly installed on the back face of the other vertical plate. The other side of the surface of the measuring plate is slidably connected with a moving frame, and one side of the moving frame is fixedly provided with a clamping groove block. According to the bridge crack detection device, through the arrangement of the measuring plate and the sliding frames, when a measurer needs to detect the width of a bridge crack, one sliding frame can be fixed to one side of the crack, then the other sliding frame is fixed to the other side of the crack, and the measurer observe