Load curve data access method

The invention discloses a load curve data access method. During storage, the capture time and the load value are stored in the time storage area and the value storage area respectively; the capture time is stored according to a structural form of time slices, each time slice corresponds to a load value set, and the load value set comprises one load value or more than two continuous load values; the time slice comprises time interval data corresponding to the load numerical value set, and further comprises numerical value index data pointing to the storage position of the corresponding load numerical value set in the numerical value storage area. During searching, the searched time period is compared with the time interval data of the time slice, the time slice is positioned, and then the target load value in the value storage area is positioned according to the value index data of the time slice. According to the method, the irreconcilable contradiction between the search and the integrity of the data record