The invention discloses a treatment method for bad-quality raw oil. The method includes the steps that 1, the bad-quality raw oil is subjected to a superficial hydrogenation reaction, so that gas, hydrogenated naphtha, hydrogenated diesel oil and hydrogenated residual oil are obtained, wherein with the bad-quality raw oil being a standard, the productivity of the hydrogenated residual oil is controlled to be 85-95 wt%; b, the obtained hydrogenated residual oil in the step a is subjected to a first catalytic cracking reaction, so that first dry gas, first liquefied gas, first gasoline, first diesel oil and first wax oil are obtained; c, the first wax oil obtained in the step b is subjected to a hydrogenation reaction of wax oil, so that hydrogenated wax oil is obtained; d, the hydrogenated wax oil obtained in the step C is subjected to a second catalytic cracking reaction, so that second dry gas, second liquefied gas, second gasoline, second diesel oil and second wax oil are obtained. Compared with the prior art, the method can prolong the running period of a hydrogenation device for the bad-quality raw oil and lower chemical hydrogen consumption.