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Hydrogen energy is a kind of secondary energy with abundant sources, green and wide application, which can realize the interconversion of chemical energy and electric energy. It is an important path for achieving deeply clean decarbonization in many fields. In addition, hydrogen will become an indispensable carrier for energy transformation and development. Electrochemically splitting water into hydrogen by renewable energy has attracted much attention due to its high efficiency, easy operation and no secondary pollution. However, the overall efficiency of hydrogen production by water electrolysis is severely restricted by the high overpotential of anodic oxygen evolution reaction (OER) and the sluggish reaction kinetics. Therefore, it is expected to use thermodynamically more oxidizable chemicals as anode additives to assist water splitting to produce hydrogen, such as electrocatalytic alcohol oxidation, which can not only significantly reduce the overpotential of hydrogen production from water splitting, but also synthesize green products with high added-value. Therefore, this paper reviews the research progress of hydrogen production from water splitting assisted by electrocatalytic alcohol oxidations in recent years, and focuses on the reaction mechanism, electrocatalytic performance, and the product selectivity of alcohol oxidations by transition metall catalysts, as well as their structure-activity relationship. Finally, the challenges and development of alcohol oxidations assisted hydrogen production from water splitting are prospected to shed light on rational design of high-efficient electrocatalysts for hydrogen production from water splitting assisted by electrocatalytic alcohol oxidations. [ABSTRACT FROM AUTHOR]