Abstract:China is on the path of constructing sponge city on account of urban’s sustainable development and environment and resources’ coordination pressure.This paper reviewed the theories and practices of the sponge city construction at home and abroad, and put forward that the performance evaluation of it should improve the effectiveness of index weight and performance assignment in view of the lack of related domestic research.To ensure the credibility of experts individual scores and finally determine the construction performance level of sponge city,we studied the group consistency of the above mentioned based on the group evaluation theory, and introduced the average distance consensus degree and P-order symmetric mean ratio to amend the deviation of index weight and performance assignment.A case study is presented to verify the feasibility and validity of the evaluation method.