The invention discloses a performance appraisal method based on weight adjustment, which comprises the following steps of: firstly building a staff index appraisal system; setting different weights according to different assessment indexes and different grading roles; and finally appraising the performance of staff in a form of a centesimal system, wherein the staff index appraisal system is built for grading the staff in a mode of appraising the staff by leaders, by themselves or by other staff in a department. In the determination of the weights for performance appraisal, the judgement of scores is the effective quantization of an assessment standard, the quantized scores are adopted for each assessment project, the different weights are set according to different ranks, and performance appraisal scores of the staff are obtained according to the weights. The performance appraisal method based on the weight adjustment is objective in appraisal process and correct and fair in result.