The invention discloses a big data platform-based power data processing method. The method comprises the steps of obtaining application data in a power network; performing collection processing on the application data according to a preset mode, and after a data form is formed, sending and storing the processed collected data in a big data platform matched with the power network; in the big data platform, performing visualization processing on the collected data and performing real-time display; performing associative condition analysis on the collected data by adopting a clustering algorithm, and finding out key power nodes in the power network; and analyzing historical fault data in the power nodes by adopting an associative rule method, performing assessment and continuous tracking on the power nodes, and when operation of a node has a fault, performing prediction to obtain fault conditions of other nodes. According to the big data platform-based power data processing method, the power data collection and utilization efficiency can be improved and the fault point prediction can be accurately realized.