The invention discloses a long-acting antibacterial textile plant fiber material. A method for preparing the long-acting antibacterial textile plant fiber material includes drying plant materials; carrying out plant stem fiber and plant leaf pulp separation treatment on the dried plant materials; extracting plant essential oil in plant leaf pulp to obtain extract liquid; pretreating plant stem fibers and then coating and modifying the plant stem fibers by the aid of cyclodextrin to obtain modified stem fibers; immobilizing the extract liquid by the aid of the modified stem fibers and then carrying out low-temperature freeze drying to obtain the long-acting antibacterial textile plant fiber material. The long-acting antibacterial textile plant fiber material has the advantages that the stemfibers with abundant antibacterial plants are used for preparing textile fibers, and accordingly the long-acting antibacterial textile plant fiber materials has unique faint scent smell of the plantsand natural antibacterial properties; the plant stem fibers enveloped by the cyclodextrin are outstanding in performance, the toughness can be improved to a certain extent, extract liquid componentswith the plant essential oil further can be immobilized, and the long-acting properties of antibacterial characteristics can be improved.