The ranking metric was mapped into high dimensional state space to discover the classification information hidden in the membership degree and the non-lienear order conversion,which could not achieve in the one dimensional space, was transformed into the conversion between membership degree vector in the high dimension space.The influence degree of the bottom plan to object was calculated to rank the bottom index,and then the hierarchy analysis model based on non-linear order conversion was established.The wastewater dam of a mine with foundation seepage was taken as an example to establish the three-layer hierarchical structure for verification,based on the 4 seepage reinforcement plans and 6 measurement indices.The results show that the model can implement the non-linear order conversion and serve as the method of ranking the complex hierarchical structural problem.