The invention discloses a novel bridge temporary lighting device. The novel bridge temporary lighting device comprises a seat body arranged in a bridge, a moving portion arranged in the seat body anda linkage cavity formed below the moving portion. An inserting groove is formed in the left side face of the seat body. A power connection hole communicating with the inserting groove is formed in theright side wall of the inserting groove. A sliding portion communicating with the inserting groove is arranged at the bottom of the right side of the inserting groove. An isolation plate is arrangedin the sliding portion in a manner of being capable of sliding up and down. A first hole is formed between the sliding portion and the linkage cavity in a communicating manner. A first rotary shaft isarranged in the first hole in a running fit manner. The novel bridge temporary lighting device is simple in overall structure and low in manufacturing cost; lighting is safe and stable; the electricleakage accidents in the existing life are greatly reduced; the safety of people is effectively guaranteed; and the novel bridge temporary lighting device is suitable for being used and popularized.