The invention discloses a high-dimensional power big data visualization method and system, and the method comprises the steps: collecting the global total data of power distribution and utilization ofpower grid operation, and carrying out the serialization processing, and obtaining a high-dimensional power big data set; performing dimension reduction processing on the high-dimensional power big data set based on a manifold learning local linear embedding (LLE) algorithm; and performing data mapping on the power big data after dimension reduction processing, and sending the power big data to avisualization platform to realize visualization of the high-dimensional power big data. The problems of dense primitives and graphic overlapping of visualization of high-dimensional power big data are solved, and the data are clearly displayed.