In order to ensure the realism of visualizing complex forest scene and maintain the constancy of generating dynamic forest scenes, this paper presents an approach to the adaptive visualization of multi-style composition for complex forest scene. The approach determines the mixing ratio of tree models according to model contribution functions based on the range of visibility, which establishes the multi-style composition visualization model of forest scene. After estimating the calculating time of tree growth model and the rendering time of 3D models, as well as calculating the importance of trees in forest scene, the best scheme is obtained to generate the forest scene. It keeps a relatively good stability of generating forest scene, and the rendering strategy of forest scene is dynamically adjusted according to simulation results. To verify the effectiveness and practicality of this approach, we applied it to the dynamic forest simulation scene. The application results show that this adaptive visualization of multi-style composition can achieve great visual reality and improve the efficiency of forest scene roaming, which makes forest scene roaming more stable and smooth.