A method for enhancing the therapeutic effect of a stem cell on autoimmune diseases, cardiovascular diseases, and/or hematological diseases is provided. The method comprises treating the stem cell with ligustilide, wherein the treatment is conducted in a culture medium of the stem cell. A method of stem cell treatment is also provided, comprising administering to a subject suffering from autoimmune diseases, cardiovascular diseases, and/or hematological diseases an effective amount of a stem cell or a combination of ligustilide and a stem cell, wherein the stem cell has been treated with ligustilide.
