Mobile agent technology can be used as one of the key technologies for new compo nentware frameworks. The communication mechanism of mobile agent plays a very im portant role in mobile agent systems. Based on the design of the mobile agent sy stem——Mogent, after analyzing the mobility's influence on its communication me chanism, the authors propose a systematic solution to communication mechanism us ed in Mogent system in this paper. This mechanism involves agent naming, agent a ddressing and agent communication failure solutions, and its high availability, performance and robustness are demonstrated.