In this paper, supposed that only one member enterprise apply investment, static game model and dynamic game model are established respectively to analyze the investment arrangement in Business Groups; In the circumstance of dynamic game, two cases that holding company takes action first while member enterprises follow as well as member enterprises act first and holding company follows are studied, then the results are discussed, and suggestions on investment arrangement in business groups are put forward Supposed that more than one mem ber enterprise apply for investmerit，the mechanism that can in duce better investment decision is designed，and the effectiveness of the mechanism is proved．