The invention discloses a visual bolt looseness prevention washer turn-over tool comprising a turn-over pressure rod. A locating guide head capable of moving up and down is arranged in the lower end of the turn-over pressure rod. The locating guide head and the turn-over pressure rod are connected through a lower pin bolt. An upper pin bolt is arranged on the turn-over pressure rod and located above the lower pin bolt. The outer side of the turn-over pressure rod is sleeved with a pressure spring. The pressure spring is arranged between the lower pin bolt and the upper pin bolt. The upper endof the turn-over pressure rod and the lower end of heavy hammer sliding rod are fixedly connected. A tray is arranged on the lower portion of the heavy hammer sliding rod. The part, located above thetray, of the outer side of the heavy hammer sliding rod is sleeved with a heavy hammer. The bottom of the turn-over pressure rod is provided with a protrusion. An angle-adjustable camera is fixed to the part, located on the upper portion of the protrusion, of the lower end of the turn-over pressure rod. The visual bolt looseness prevention washer turn-over tool is an assembly, convenient to assemble and disassemble, simple and reliable in structure, low in use cost, free of quick-wear parts, convenient to use and free of maintenance.