The invention relates to a data search method. Data is organized and stored according to the fractal tree principle. The data search method includes: by a CPU, receiving a data reading request; searching the requested data in Cache Line; if the requested data is found in the Cache Line, reading the data and terminating the searching; if the requested is not found in the Cache Line, determining the possible storage position of the data in CPU Cache through numeric comparison; searching for the data in the corresponding interval in the CPU Cache according to the possible storage position of the data in the CPU Cache; if the requested data is found in the CPU Cache, reading the data and terminating the searching; if the requested data is not found in the CPU Cache, determining the possible storage position of the data in an internal memory; searching for the data in the corresponding interval in the internal memory according to the possible storage position of the data in the internal memory; if the requested data is found in the internal memory, reading the data and terminating the searching; if the requested data is not found in the internal memory, searching the data in a hard disk. By the data search method, the times of data exchanging between the Cache and the internal memory can be reduced, and CPU speed can be increased.