The invention discloses a real-time calculation method for reservoir level-storage capacity on the basis of a Kriging interpolation. Large-scale level-storage capacity curve data provided by a designer of a reservoir construction period is used as sample data, and real-time storage capacity data is calculated by a Kriging interpolation method through the actual measurement real-time level data. Byuse of the method disclosed by the invention, a non-monotonic relationship between the reservoir level and the storage capacity can be reflected. Compared with a traditional method, the method disclosed by the invention has a small error for a storage capacity rechecking result, and can be applied to production reality.