This paper takes the dialectical materialism and the historical materialism as the basic guiding ideology, and takes interactional relations between Taiwan politics reforming and development of intercoastal relations as the research angle of view, the multi-disciplinary theory and research technique, such as the politics, the history study, the sociology, the ethnology and so on, are utilized synthetically to omni-directional carefully examine the process of Taiwan politics reforming, the influence of reforming on political ecology vicissitude in the island and on intercoastal relations. It has promulgated systematically the occurrence, the development and its the influence of the Taiwan politics reforming, especially it is systematically discussed about the impact which the reforming has brought to the political situation in the island and the intercoastal relations.Taiwan politics reforming is not an isolated historical event, especially the particularity of intercoastal relations decides that Taiwan's political reforming and intercoastal relations are closely connected. This paper will make the systematical expatiation to the following questions: the reasons for the reforming, the influence which the reforming brings to the political situation in the Island of Taiwan, from which aspects the analysis which is obtained will be more objective and accurate.This paper is divided into five chapters.The foreword part introduces the basic mentality about selecting the topic and about the composition in this paper, the theoretical significance and the practical value the paper will have if the discussion is from the political reforming angle of view, as well as this paper introduces the research situation of this selected topic at present.Chapter one: Through analyzing political and the social factors, including premise for economical development for realizing the political reforming of Taiwan, the vicissitude of politics appraisal system for populace, the legally constituted authority crisis of Republic of China and the rises of the non-party strength and so on, and the exterior factors, including Mainland opening and adjustment of policy for Taiwan, US and other overseas factors as well as Kuomintang's role choice in Taiwan politics reforming in different dimensions, this paper has explained the origin of the Taiwan politics reforming from the different angles.Chapter two: Through the analysis of Jingguo Jiang's innovate politics action of rescinding martial law lifting a ban and so on, and Denghui Li's six modifying constitution, this paper explains the start and the process of Taiwan politics reforming; through the analysis of Establishment of political party such as Democratic Progressive Party, and Kuomintang's completion of the dignity regeneration with the mind of competition, and preliminary production of party's political ecology, and the analysis that election becomes the sequenced method to distribute political resource and so on, this paper explains politics reforming and the constructing of Taiwan new political system.Chapter three: through the analysis of the tendency, which is caused by the politics