Coke is used as reductant for blast furnace ironmaking, which is in great demand. The production process accompanies by a large number of coke oven gas (COG) generation, which has complex compositions, rich in hydrogen and high calorific value. However, about 20% gas is directly discharged or burned away in the way of "lighting the sky lamp", which conflicts with the current situation of hydrogen production capacity shortage and high price, and goes against the "double carbon" target. Realizing the clean and efficient utilization of coke oven gas is one of the key factors to promote the high-quality development of coking and metallurgical industries. At present, physical methods are the main technologies for producing hydrogen from coke oven gas, such as pressure swing adsorption (PSA), cryogenic process, membrane separation, etc. and the non-catalytic and catalytic reforming, oxygen transfer membrane (OTM) reforming, chemical looping reforming and other chemical producing hydrogen technologies are also focused, aiming at providing clean raw material gas for the downstream petrochemical, metal smelting and processing industries and others. The principle, characteristics, research and application progress of different hydrogen production technologies from coke oven gas were reviewed, and suggestions were given for the problems of the low exploitation level of coke oven gas and the low utilization rate of CH4, CO2, CO, tar and benzene. For physical purification and separation technology, the design and development of highly selective adsorbents, separation membranes and equipment intensification are the research keys. For chemical reforming technology, the construction of sulfur-resistant catalyst, oxygen transfer membrane, oxygen carrier and industrial exploration are the research focus. The combined hydrogen production process of chemical method and physical method includes purification, reforming, separation and other processes, which is an important path to realize clean, efficient and high-value utilization of coke oven gas, and an important direction of future development.