The invention relates to a Chinese medicinal decoction for treating leucocytopenia caused by chemotherapy for cancer, and also to the process for preparation, wherein the constituents include (by weigh ratio) root of American ginseng 20g, hairy deerhorn 30g, ganoderma lucidum 20g, astragalus root 30g, fruit of barbary wolf berry 20g, Chinese caterpillar fungus 20g, dry human placenta 20g, aniseed 10g, prepared aconite root 20g, notoginseng 10g, euphoria longan steud 20g, white atractylodes rhizome 10g, Ficus carica 20g, dried rehmannia root 20g, psoralea fruit 10g, aloe 10g, turtle shell 10g, ophiopogon root 10g, ligustrum japonicum 20g, Siberian solomonseal rhizome 10g, broomrape 10g, mongloian snakegourd 10g, root of herbaceous peony 10g, coix seed 10g, cornus officinalis 10g, rhubarb horsetails 5g, cape jasmine 5g, schisandra fruit 10g, licorice root 10g, lily bulb 5g.