The invention discloses a finite element-based full parameterized gear meshing analysis method, which comprises the following steps that: a user interaction interface is established by using an ansys parameterized design language (APDL), the initial parameters of a gear is identified, parameters which influence the geometrical shape and material of the gear are confirmed, then a tooth profile is obtained based on an involute and a transition curve parameter equation, and a complete gear tooth profile and a three-dimensional gear solid model are generated; and then, APDL implementation of parameterized mapping grids is carried out, end faces are segmented, proper grid units are selected to generate a complete gear parameterized model, after the parameterized model is obtained, assembly and contact analysis of the two gears are considered, initial contact of the gears is defined, corresponding boundary conditions are applied, and finally solving is carried out to obtain gear meshing results required by tooth surface contact stress, contact slippage, von Mises stress diagrams, deformation diagrams and the like.