The invention relates to a distributed power source and micro grid hybrid power supply system, comprising a distribution network to which a distributed power source and a load are connected, and a micro grid connected with the distribution network. The distributed power source and the load are configured outside the micro grid and directly connected to the distribution network. A distributed power source, a load and stored energy in a micro grid constitute a micro grid, which is then connected to a grid. The wiring mode of the power supply system adapts to possible working conditions such as failure and overhaul in the running process, and the running mode can be transformed according to the working condition and is very flexible. While taking into consideration high reliability and other advantages of power supply based on a micro grid, constraints such as cost of investment and control difficulty are considered, and an appropriate micro grid scale is maintained.