Abstract-On the basis of the present negotiation theories and models,a dynamic negotiation model based on mobile agent is put forward. This model supports a continuous and dynamic negotiation environment, making all the buyers and sellers participate in or exit from negotiation freely, and forming a competitive system. It also puts forward a dynamic concession strategy based on opponents attitude learning is proposed. By learning the track of the proposals, agents can understand each other's preferences, attitude and urgency. Then, it helps both parties to make decision under a dynamic environment and achieve maximum utility. Finally, a test system of the model is built to verify whether the system is correct and has operability and scalability or not.