The invention discloses a loss calculation method for a grid-connected station area containing distributed generators. The method comprises the steps of firstly collecting loss calculation data of thegrid-connected station area and processing the distributed generators by adopting an equivalent load method; calculating load power of the electricity transmitted from an A-phase line, a B-phase lineand a C-phase line of each line segment according to the form that station area loads are connected to a power grid and the condition of the phase in which the connected power grid is located; calculating three-phase unbalance and a neutral line loss correction coefficient of each line segment, equivalent impedance of which the impedance is converted to a head end and the equivalent impedance ofthe whole grid of considering the loss correction coefficient; calculating a loss shape correction coefficient through a distributed generator output and load output shape correlation coefficient of the station area and calculating a shape coefficient of the station area loads; and finally obtaining the electric energy loss of the station area power grid. According to the loss calculation method,accurate calculation of the loss condition of the station area power grid containing the distributed generators is achieved.