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The kinematics and dynamics characteristics of a double-ring multi-rod antenna deployment mechanism were analyzed. Firstly, the configuration characteristics of the deployment mechanism were analyzed, and the unit decomposition of the whole mechanism was carried out. Based on the screw theory, the screw constraint diagram of the unit mechanism was drawn. Then the screw constraint equations of the unit mechanism were established, and the angular velocity and the linear velocity of the center of mass of the components in the mechanism were obtained by the screw velocity recursion. The velocity Jacobian matrix was obtained by the coordinate transformation derivative method. The screw acceleration and angular acceleration of the components and the linear acceleration of the center of mass were obtained by using the screw derivative and the screw acceleration synthesis rule. Finally, based on the Lagrange equation, the dynamic equation of the whole mechanism was established. Through numerical calculation and simulation, the kinematic and dynamic characteristics of different components were analyzed, and the correctness of the theoretical derivation was verified. The overall structure of the double-ring multi-rod antenna deployment mechanism analyzed was simple. It was a single-degree-of-freedom mechanism that can be folded and unfolded with only one drive. The kinematics and dynamics modeling and analysis method based on the combination of screw theory and Lagrange method had clear physical meaning, it can be better applied to the analysis of such space deployable mechanisms.