By an analysis of the main factors that cause inaccuracies in the spatial load forecast（SLF） method based on time series， a time series mismatch corrective method for identifying and correcting load transfer is proposed. The temporary load transfer often occurring between cellules is divided into two types， i.e. cross-unit time load transfer and non-cross-unit time load transfer. With the time series mismatch corrective method， improved load transfer coupling（LTC） is used to overcome the negative impact on the SLF due to cross-unit time load transfer， while the cumulative load curve for determining the maximum load of each cellule is used to overcome the negative impact on the SLF due to non-cross-unit time load transfer. A practical SLF case has shown the applicability and effectiveness of the method proposed.