The existing international economic and trade rules have formed an organic synergy with"fair arena rules",interest adjustment rules and enforcement rules as the three major fulcrums.The breadth and depth of rules advance rapidly with intensive economic and trade negotiations,and gradually entering a period of reconstruction.The emergence of the digital economy brings new issues into the evolution of rules,while it also impacts existing frameworks and contents of rules.On the basis of revising the existing theories of institutional origin and evolution,this article constructs a theoretical model for reshaping international economic and trade rules under the impact of the digital economy,proposes implementation paths and typical models,and predicts future trends and adjustment directions.The main conclusions are as follows.First,the emergence of the digital economy has disrupted the steady state in the evolution of international economic and trade rules.The emergence of potential interests induces relevant interest groups to propose rule demands and ultimately achieves political equilibrium through a two-stage game at domestic and international levels.Second,in the process of forming digital economic and trade rules,three models have emerged;one is the"gradual reshaping plus internal-to-external promotion model"advocated by the United States,the European Union's"key focus plus internal-to-external regulatory model",and China's"bidirectional linkage plus docking model".Third,the reconstruction of international economic and trade rules under the impact of digital trade is mainly reflected in"fair arena rules"with minor adjustments made in interest adjustment rules and enforcement rules.Fourth,China's participation in the reconstruction of international economic and trade rules started late but it has made rapid progress.However,it still faces many institutional obstacles,as well as challenges arising from the international environment and pressure.It is urgent for China to take targeted measures to promote the innovative development of digital economic and trade rules.