A hydrocarbon continuous liquid-phase hydrogenation process includes: hydrocarbon raw material and hydrogen are fully mixed through a gas-liquid mixer to form liquid-phase material flow saturated in dissolved oxygen, the liquid-phase material flow is sequentially in contact reaction with each level of catalyst bed liquid from top to bottom in a reactor containing at least two levels of catalysts, hydrogen is injected into a hydrogen distributor on the lower portion of each level of catalyst bed, and products are guided out from the reactor and subjected to subsequent treatment.