Efforts for promoting trust play an important role in e-commerce security, which is a key to the acceptance and general deployment of this type of applications. So we introduced a trust-aware mobile multiple micro-payment mechanism based on smart agent to establish business trustworthiness. The proposed trust model is based on experiences since it requests a great ability in the configuration of the factors allowing the trust establishment. The agent of the mobile user can modify parameters. To evaluate this approach, we developed a simulation of a music service system in a mobile e-commerce. The average experimental result of this approach is obviously superior to other non-trust payment.