Coke oven gas source reforming upgrading method

The invention belongs to the technical field of coke oven optimization, and provides a coke oven gas source reforming and upgrading method which comprises the following steps: firstly, selecting a coke oven with a three-way valve group; then, water-containing raw coke oven gas at the initial coking stage of the coking chamber is guided to flow to the coking chamber at the final coking stage to promote water gas reaction; coke oven gas source reforming upgrading is completed; the three-way valve group is used for controlling and guiding the raw gas at the initial stage of coking, so that the furnace top space temperature of the coking chamber at the final stage of coking can be effectively controlled, and chemical product cracking and graphite growth caused by overhigh furnace top space temperature are avoided; the raw coke oven gas at the initial stage of coking is guided into the coking chamber at the last stage of coking for water gas reaction, so that graphite on the surface of the coking chamber is consum