The invention provides a wind generating set power curve drawing method based on the quantiles. In a power-wind speed coordinate system, bins are defined through wind speed sections; a plurality of power value points corresponding to different quantiles and describing a wind generating set in the corresponding wind speed section are found out from each bin; each quantile has one corresponding probability P; the power value points corresponding to the same quantile are selected from each bin; and the selected power value points are connected to form a power curve of the corresponding probability P of each quantile. According to the wind generating set power curve drawing method based on the quantiles, when the power values of the wind generating set are measured and the power curves based on the quantiles are drawn, even if excessively high or excessively low power values caused by misoperation or false reading or the like occur, as the method is not like a method for calculation through an average value of power values to need all selected power values to participate in calculation, the power curve of the wind generating set is drawn more accurately.