The invention belongs to the technical field of data analysis. The invention discloses an efficient compression and library reading method based on oracle LOB. The method comprises the following steps: respectively carrying out read-write and exchange speed test on compressed and uncompressed data of Clob and Blob by using three compression algorithms, namely Bzip2, Gzip and GzipIO, and carrying out library reading speed test by using three methods, namely direct reading, segmented reading and segmented + thread pool reading. Whatever the present invention is to store in storage, the exchangespeed or the read-write speed is better than that in the prior art; Blob + Gzip is an optimal storage structure of item minute-second data; reading, writing and exchanging speeds are greatly improved,the overall capacity of a database is reduced to 7% at present, a segmented + thread pool library reading technology shows high library reading efficiency no matter in the case of Clob, Blob, compression or uncompression, and leap-type improvement is brought to LOB data reading speed.