The invention relates to a high-density distributed inverter grid-connected digital-analog hybrid simulation system. The system comprises a digital simulation subsystem, a physical subsystem, an uppercomputer monitoring unit and a signal interface unit, wherein the digital simulation subsystem is connected with the physical subsystem through the signal interface unit; the upper computer monitoring unit is used for being connected with the digital simulation subsystem and the physical subsystem through Ethernet; the signal interface unit is used for controlling the physical subsystem and the digital simulation subsystem to achieve control and energy exchange between the digital simulation subsystem and the physical subsystem.