The invention discloses a method for enhancing logical volume management LVM functions, comprising the following steps: respectively setting a P factor of a physical volume and a P-C factor of a logical volume; obtaining the established or expanded logical volume containing the P-C factor and physical volume segments of the mapped physical volume containing the P factor; selecting one physical volume segment with a maximal P value and judging if the size of the physical volume segment is larger than and equal to that of the established or expanded logical volume when the size summation of thephysical volume segments is larger than or equal to the size of the established or expanded logical volume; if the size of the physical volume segment is larger than and equal to that of the established or expanded logical volume, mapping the established or expanded logical volume to the physical volume segments; and if the size of the physical volume segment is smaller than that of the established or expanded logical volume, sorting all the physical volume segments according to comparison values, and mapping the established or expanded logical volume to the physical volume segment with the maximal comparison value till the establishment and expansion process of the logical volume is completed. The method not only considers the continuity of physical blocks but also considers the propertyof storage equipment when the logical volume is established and expanded.