Abstract: Mobility model is one of the basic researches of opportunistic network. The quality of the mobility model has a direct impact on the routing algorithm and network topology. Based on the analysis of the main factors affecting the quality of mobility model and their relationship, evaluation index system of mobility model is proposed. Based on the analytic hierarchy process (AHP), a quantitative evaluation method of mobility model is proposed. First of all, the model evaluation is divided into target layer, criterion layer and scheme layer. Secondly, the weight of each element on the upper layer is obtained. Finally, the weighted sum method is used to obtain the final weight of the scheme layer to the target layer, so as to obtain the sorting of different models. This method realizes the quantitative evaluation of the mobility model. It not only provides new ideas and methods for mobility model evaluation, but also provides help and guarantee for mobile node modeling. Finally, the validity of the evaluation method is validated by taking the classic random mobility model (random Gauss-Markov (GM), random waypoint model (RWP), random walk model (RW), random direction model (RD)) as an example.