Although the distributed current sharing control strategies of renewable energy in the DC microgrid has been widely studied, the communication lines in DC microgrids are often unreliable or nonexistent. Based on this, this paper proposes an innovation current edge-control strategy for the multi-bus DC microgrid without traditional communication networks to achieve the current sharing. Firstly, the information-energy dual modulation(IEDM) is designed to eliminate traditional communication devices and communication line networks, which achieves the information exchange among renewable energy sources. Furthermore, the state-space function regarding the multi-bus DC microgrid is built, which is further switched to the standard heterogeneous multi-agent systems. Based on the proposed model, this paper proposes a secondary H_∞ consensus approach to achieve accurate current sharing. Based on the proposed IEDM, the periodic dynamic event-triggered communication mechanism is proposed. Finally, the performance regarding the proposed control strategy is verified through the CHIL experiment test system.