The invention discloses a method for identifying a wide-area adjustable load, which comprises: implementing feature extraction technology based on an adjustable load; correcting extracted characteristic parameters according to the spatial distribution characteristics of various typical loads; obtaining a mapping relation of the training membership for the component ratio of the load type based onthe calculation of the cluster center matrix and the membership; and identifying the component ratios of various typical loads of load points. The method for identifying the wide-area adjustable loadof the present invention can overcome the problems that the load adjustable characteristics cannot be extracted and the identification is difficult in the prior art, and has the advantages of good identification effect and small error.