The invention discloses a method for delaying coking by supplying hydrogen. The method comprises the steps of circulating heavy oil to carry out hydrogenation in a reactor to generate hydrogen supply distillate which is rich in naphthenic aromatics, wherein the hydrogenation reactor which is adopted is a continuous stirred tank reactor; maintaining system pressure by adopting hydrogen, wherein a used catalyst is an Ni-Al2O3 immobilized catalyst, the mass concentration of the catalyst is 0.1 to 1 wt percent, the reaction temperature is 300 to 500 DEG C, and the reaction pressure is 4 to 10 MPa; serving the hydrogen supply distillate which is rich in the naphthenic aromatics as a hydrogen donor, and enabling the hydrogen donor to enter a coking delaying system after the hydrogen donor is mixed with raw residual oil. According to the method disclosed by the invention, the liquid yield can be increased to a large extent, the productivity of gas and coke is reduced, and the mass liquid yield can be up to 60 to 70 percent.