With the steady advance of smart grid construction， the integrity， consistency and accuracy of dispatching data are becoming increasingly important. The integration platform of the smart grid dispatching technical support system， in turn， should take dispatching data quality identification into consideration. The data platform is a data integration， sharing and service center that can provide the technology base for data quality identification. Expounded in this paper is the technology architecture including the unified code， identification rule and identification method. This paper deals with various specific identification methods that take into account the intrinsic properties， statistical rule， electrical connections， topology， multiple source data analysis and events constraint. Also dealt with are the identifying practice scheme consisting of all kinds of identifying methods and quality identification processes. An identification instance is detailed. Preliminary practice shows that the method is practical and feasible.