The invention discloses a crude oil processing method, which comprises normal-pressure distillation and reduced-pressure distillation, wherein the heavy oil at the bottom of a normal-pressure distillation tower, namely normal bottom oil, is mixed with part of circular reduced-pressure residual oil at the bottom of a reduced-pressure distillation tower, the mixture enters a flash tower, and a top gas phase, namely flash top gas, of the flash tower undergoes heat exchange and is condensed into a liquid phase to be discharged out of the device as a product; and bottom oil, namely flash bottom oil, of the flash tower, is heated in a reduced-pressure furnace to 390 to 420 DEG C, the heated bottom oil is intruded into a flash section of the reduced-pressure distillation tower from a reduced-pressure oil transfer line for reduced-pressure distillation, proper distillate product is drawn from a side line of the reduced-pressure distillation tower, part of reduced-pressure residual oil drawn out from the bottom of the reduced-pressure distillation tower is circulated, and another part of the reduced-pressure residual oil is discharged of the device. Compared with the prior art, the method can effectively improve the drawing rate of a reduced-pressure distillation process and can reduce the load of the reduced-pressure furnace and the reduced-pressure distillation tower at the same time.