The invention discloses a relative influence analysis model applied to evaluation of distribution network construction and renovation schemes and power supply quality indexes, and the model is used for carrying out comprehensive quantitative evaluation on the distribution network construction and renovation schemes from the perspective of power supply quality so as to fill the gap of the researches of relative fields at the present stage. The method comprises the following steps: determining a subjective weight by utilizing an AHP method; determining an objective weight by utilizing an entropy evaluation method; determining a comprehensive weight of the power supply quality indexes by utilizing a multiplicative combination method; and calculating the power supply quality comprehensive indexes of the distribution networks corresponding to the construction and renovation schemes by utilizing a multilevel gray relative analysis method. According to the relative influence analysis model, comprehensive quantitative evaluation can be carried out on the distribution network construction and renovation schemes from the aspects of power supply reliability and electric power quality, the subjective determination and objective determination of the weights are combined, and the relevancy is calculated level by level by utilizing the multilevel gray relative analysis method, so that the evaluation process is scientific and reasonable and has favorable universality, and reference and basis are provided for the making of the distribution network construction and renovation schemes.