The invention discloses a device for recycling coke oven raw-gas benzene substances by using raw-gas waste heat. The device comprises a gas-liquid separator, wherein the gas-liquid separator is connected with a coke oven raw-gas pipeline and a tar-ammonia water separator; the tar-ammonia water separator is connected with a tar pump and a circulation ammonia water pump; the gas-liquid separator is connected with a heat pump unit; the heat pump unit is connected with a gas cooler and cleaning oil pump, and is connected with a lean-fat oil heat exchanger, a lean oil tank and a raw gas washing tower; the lean-fat oil heat exchanger is connected with an oil-gas heat exchanger, a negative pressure distillation tower and a light benzene cooler; the negative pressure distillation tower is connected with a liquid outlet of a fat oil pump and the bottom of the raw gas washing tower; the heat pump unit is connected with the negative pressure distillation tower, a liquid inlet of a heat lean oil pump and the lean-fat oil heat exchanger; the negative pressure distillation tower is connected with a naphthalene oil tank and a heavy benzene tank; the light benzene cooler is connected with a reflux pot and a non-condensable cooler; the non-condensable cooler is connected with a vacuum pump; the reflux pot is connected with a reflux pump and a separation water tank; the reflux pump is connected with the negative pressure distillation tower and a crude benzene tank.