By recalling the process of“5·22”military coup of Thailand，the paper considers that，the storage reform problem in the national development path selection，the power conflicts between the old and new interest groups，the lack of deliberative democracy in the constitutional system，were the deep-seated primary causes of periodic coups in Thailand. After the coup，Thailand’s political situation may appear the following trends. First，military influence will be significantly improved. Second，political power relations will face a structural adjustment. Third，political reconciliation will depend on the development of Sino-Thai strategic cooperation.