The invention relates to a renewing and transforming method for oasis protection forest in drought regions. The method is characterized by comprising the following steps of: in front of wind sand, carrying out row alternated cutting mode on an original Populus bolleana forest belt, (namely retaining one row of Populus bolleana and cutting one row of Populus bolleana, then retaining one row of Populus bolleana and cutting one row of Populus bolleana, and the like), and separately planting Populus bolleana seedlings and russian olive seedlings in the cut rows in the forest belt in an inter-plant mixing mode; carrying out early-stage protection on the seedlings by utilizing the retained Populus bolleana to guarantee the survival and growth of the Populus bolleana seedlings and russian olive seedlings; and cutting the retained Populus bolleana after newly planted Populus bolleana and russian olive have a certain protection effect, and renewing the oasis protection forest by the same method. By the adoption of the method provided by the invention, healthy growth and protection function of the oasis protection forest can be achieved and fine circulation of wood can be provided.