The invention provides a power flow calculation method for a flexible interconnecting alternating current-direct current hybrid power distribution network. The power flow calculation method comprises the steps of A, establishing an alternating current power distribution system model and a direct current power distribution system model; B, disassembling the alternating current and direct current hybrid power distribution system; C, establishing a mathematical model for a power exchange interface between an alternating current sub network and a direct current sub network; D, carrying out power flow calculation on the alternating current sub network; E, carrying out power flow calculation on the direct current sub network; and F outputting the power flow calculation result. According to the technical scheme provided by the invention, the alternating current and direct current hybrid power distribution system is disassembled into the alternating current system and the direct current system; different power flow calculation methods are carried out on the alternating current system and the direct current system separately; and in addition, power exchange is only implemented on certain calculation nodes, so that the calculation speed is greatly enhanced.