A continuous power flow calculation method based on a wind power fluctuation rule comprises: analyzing an active power fluctuation feature of a wind power field by adopting an analytical method of a Poisson process, and establishing a probability model; determining a time interval of wind power output fluctuation and an output variation situation of power of the wind power field according to the probability model and a statistical result of wind power variations, to obtain a fluctuation rule of the wind power output; performing continuous power flow calculation within the same time interval according to the fluctuation rule, to obtain a state variable value; and analyzing the state variable value, and analyzing an influence of large-scale wind photoelectricity access on the power flow, to obtain the influence of wind power on the power flow. The above calculation method has the advantages of wind power fluctuation compatibility and high calculation speed; the method is applied according to actual power grid data, and the correctness and the practicability are proved.