A power distribution network simulation load flow calculation method relates to a simulation load flow calculation method, and aims to solve the problems that an existing simulation load flow calculation method is long in a calculation time; the method comprises the following steps: 1, reading original data of a distribution network; 2, forming a network nodal admittance matrix; 3, reading initialvoltage values of all nodes as balance node voltages, setting a node active power deviation second order item as zero, and setting a cycle variable initial value as zero; 4, calculating iteration deviation; 5, calculating voltage deviation; 6, correcting voltages of all nodes; 7, calculating the active power deviation second order item; 8, determining whether a difference between two adjacent iteration results of the active power deviation second order item is smaller than a given error or not, if yes, outputting the result, otherwise, turning to step 9; 9, determining whether the cycle variable has reached the set maximum cycle frequency N or not, if yes, outputting the result, otherwise, adding 1 on the cycle frequency and turning to step 4. The method can fast calculate the power distribution network load flow states, thus providing basic data for power distribution network short circuit calculation and stable analysis.