The e-bidding platform of electric enterprise group purchase business is regard as a complex system of interrelated economic, organizational, social and elements as well as the external and internal information flows of a company. Getting positive synergistic effect is one of the important factors for the enterprise group procurement business innovation. The paper showcase the synergistic effect framework, and then study synergistic effect of the e-bidding platform based on complex adaptive theory .We sharp enterprise group purchase system, research how to get positive synergistic effect contributions to the enhancement of the efficiency of the business overall.