Novel utilization method for coke oven gas

The invention specifically provides a novel utilization method for coke oven gas, belonging to the technical field of the coal chemical industry. According to the method, raw gas produced by a coke oven is mixed with methane according to a certain ratio; the obtained gas mixture is introduced into a plasma thermal cracking reactor to produce a gas mixture containing acetylene, hydrogen and carbon monoxide; the gas mixture containing acetylene, hydrogen and carbon monoxide is purified and enter a separation and concentration device for extraction so as to obtain an acetylene product and tail gas; the tail gas is compressed and preheated and then enter a methanation reactor; reacted gas passes through a pressure-swing adsorption and separation device so as to obtain a hydrogen product and synthetic methane; and a part of the synthetic methane is mixed with the raw coke oven gas, the obtained mixture is conveyed to the plasma thermal cracking reactor, and the other part of synthetic methane is output as a produc