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The spatiotemporal and just-in-time mobile multicast routing protocol of Wireless Sensor Network, such as Mobicast, which has the perfect usefulness in monitoring Mobile entities, Communications with higher security requirements. Most of the existing Mobicast routing protocols is focused on the group key distribution and management, but also realized under the conditions of static grouping, which can not meet the real-time monitoring applications. A dynamic clustering secure mobile multicast scheme (DCSMS) based on Mobicast and multi-level Â¿ TESLA protocol of sensornets is presented in this paper. The multicast clusters are dynamically formed according Mobicast in the scheme. To enhance the safety of multicast communication, authentications of data source and group membership, with the secure protocol Â¿ multi-level Â¿ TESLAÂ¿, are inserted before cluster-head node is selected and node joins the group. Thus the cluster-head node participate the multicast communication and make the group moving durably as a temporary base-station. Based on the analysis and simulation results, it is shown that the influence to survival lifetime of network and real-time communication because of energy consumption and latency from authentication is acceptable.