In this paper, inverter grid test platform that based on the hybrid simulation is put forward .It is composed of digital simulator (RTDS) and power interface device and equipment to be tested. When the grid inverter and branches under the condition of power grid failure, the device can simulate the voltage sag, unbalance and harmonic disturbances such as faults. It can test the grid performance, the test proved the correctness and reliability of the mixed simulation platform. The establishment of the platform is beneficial to the new energy and modeling and simulation of the inverter. The platform provide real-time simulation for the research and test grid characteristics, the transient characteristics of grid inverter control .