The invention discloses a probabilistic load flow calculation method based on wind power fluctuation characteristics and prediction errors. The probabilistic load flow calculation method comprises the following main steps: step A, counting the probability distribution of wind power fluctuation; step B, counting the probability distribution of wind power prediction errors; step C, establishing combined conditions of predicted wind power and actually-measured wind power to predict an error probability distribution model; step D, establishing a wind power probability distribution model; step E, calculating cumulant containing wind electric power system node injection power; and step F, calculating the probability distribution of node voltage and branch load flow. The method solves the disadvantages caused by the fact that traditional representation node injection power random variable based on wind power probability distribution is single in adopted model and few in factors to consider, so that the solving accuracy of electric power system node injection power cumulant is improved.