The invention relates to the field of electric power big data analysis, in particular to a data analysis domain architecture method based on a big data platform. The method comprises the steps that onan application level, a data analysis domain is divided into an application area and an exploration area, the application area is divided into a data access layer to access data, and a data storage calculation layer which carries out data storage and data calculation and unified analysis service on the accessed data and stores the data; the exploration area comprises an open experiment environment layer and a temporary working environment layer, and the exploration area and the application area output the data storage and calculation layer to the exploration area through the data storage andcalculation layer. The data accuracy is improved, and the problems of repeated data extraction, redundant storage, low quality and the like are avoided.