The invention discloses an analysis method and system for the two-dimensional dynamic model of a high television tower structure. The method comprises the following steps that: firstly, concentratingthe masses of all structural members and non-structural members of the high television tower in a selected finite node layer, and determining positions where the node layers are arranged and the amount of the arranged node layers; on the basis of a finite element submodel corresponding to each node layer, determining the equivalent stiffness of the finite element submodel, and establishing the rigidity matrix and the mass matrix of the two-dimensional dynamic model; on the basis of the dynamic characteristics of a three-dimensional finite element model and the two-dimensional dynamic model, establishing the target function of the rigidity parameter, and carrying out the rigidity parameter correction of the two-dimensional dynamic model; and on the basis of the corrected rigidity parameter,establishing the two-dimensional dynamic model, and quickly solving the dynamic characteristics and the dynamic response of the high structure on the basis of a structural feature equation and a kinematic equation. The method disclosed by the invention has the advantages of clear physical concept, high maneuverability, quickness and accuracy in analysis and calculation, wide applicable range andthe like.