The invention discloses a grading method for echelon utilization of waste solid oxide fuel cells. The method comprises the following steps of: performing appearance detection and X-ray detection on the collected waste solid oxide fuel cells, and performing voltage-current density test on the cells which are qualified in detection to obtain a voltage-current density curve; obtaining an open-circuitvoltage value and the maximum power density value of the current solid oxide fuel cell according to the voltage-current density curve; and comparing the open circuit voltage value and the maximum power density value with an open circuit voltage and the maximum power density preset for evaluation, and grading and recovering the solid oxide fuel cells. The grading method for the echelon utilizationof the waste solid oxide fuel cells can reasonably performs echelon utilization on the waste solid oxide fuel cells, and the waste cells are applied to different occasions according to the grading, so that the residual value of the cells is fully exerted, and the waste of energy is relieved as much as possible.