The invention discloses a high-stability video monitor used for a visual angle blind zone of a school bus. Video cameras are mounted on the right front side and the right back side of the school bus; a video signal is connected to a display in the front of a driving platform through a high-anti-interference video line; a display interface is divided into display pictures of the front and the back of the school bus, so that a driver can clearly observe actual outside conditions of the right front side and the right back side of the bus body, the visual angle blind zone is eliminated, the school bus can be driven excellently and safely, and bus crash and pedestrian accidents are prevented effectively; the monitor is provided with a lightning protection measure, main bus body metal components, a chassis and a fuel tank are electrically and reliably connected through a ground lead, and a grounded discharge cable is mounted, so that the oil and gas spontaneous combustion caused by friction and static electricity is prevented; the monitor adopts an ultrawide-range voltage-stabilized source and an industrial grade electron component, even though voltage of a storage battery is reduced substantially, the stable operation of the video monitor can be also guaranteed, and 'blank screen' during starting and working of the school bus is prevented; and the blind zone monitor further can be used for cars, buses, coaches, trucks, urban slag conveying vehicles and other vehicles, and even serves as a necessary mandatory monitor for safe driving of the school bus and other vehicles.