Interface models between micro power and micro grid provided by simulation software are single, complicated, and the physical meaning of elements of interface models is not clear, which hinders the simulation software in micro power grid simulation. By using different coordinate transformation and adopting the voltage oriented control technology, the micro grid interface model is designed based on vector control technology, which solves the networking simulation interface problem of micro power and micro grid in different blocksets and operation models in Matlab/Simulink. The simulation result shows the micro grid composed by this model can correctly reflect the changes of the voltage, frequency, active power, and reactive power in all kinds of disturbances to meet the requirements of micro grid simulation.