Islanded microgrids lack of the support from upper power grid,so the frequency and voltage of microgrid will be influenced by the randomness of DG and the volatility of the load.Islanded microgrids probabilistic load flow calculation method considering correlated DG output based on monte-carlo method is presented,which can accurately analyze the operating state of microgrids in the islanded mode.First of all,the classification of gisle microgrid nodes is simplified,and the uniform expressions of island microgrid power flow are worked out;then the Monte Carlo method is used to calculate the result of probability flow considering correlated DG output.Finally,the Benchmark 0.4 kV low voltage microgrid system is taken as an example to verify the validity of the calculation method.