The invention belongs to the power distribution network energy saving technology field and particularly relates to an integrated equivalent line loss evaluation method based on the wind power generation characteristic curve. The method comprises steps that full-year wind power data of the power grid is acquired, each hour is taken as a sampling point, each wind power generation curve has 24 sampling points, n wind power generation curves are acquired, after correction of the wind power generation curves and selection of contour characteristic variables, analysis and clustering are carried out,the classification number and various-category members are determined, typical representative days of each category and weight factors are selected, an integrated equivalent typical representative day is determined according to a formula as described in the specifications, and integrated equivalent line loss under the integrated equivalent typical representative day is lastly calculated. The method is advantaged in that the integrated equivalent typical representative day has relatively good representativeness for the actual wind power conditions, the calculated equivalent line loss is closerto the actual line loss result, precise line loss control is effectively facilitated, and energy saving and consumption reduction of the power distribution network are realized.