The invention provides a plant rehabilitation drug and a preparation method of the plant rehabilitation drug, and belongs to the technical field of biological pharmacy. The plant rehabilitation drug is prepared from, by mass, 1-4 parts of ginseng, 3-6 parts of pseudo-ginseng, 15-30 parts of astragalus membranaceus, 15-25 parts of angelica sinensis, 10-20 parts of white atractylodes rhizome, 15-20 parts of herba epimedii, 10-20 parts of dandelion, 5-10 parts of as arum, 5-10 parts of ephedra, 10-20 parts of rhizoma zingiberis, 10-25 parts of liquorice, 3-5 parts of coptis chinensis, 3-5 parts of radix bupleuri, 3-5 parts of fructus aurantii, 5-8 parts of radix ophiopogonis, 3-5 parts of medlar, 5-8 parts of ligusticum wallichii, 3-5 parts of poria cocos, 3-5 parts of pericarpium citri reticulatae, 3-5 parts of fructus cannabis, 3-5 parts of cortex lycii radices, 1-3 parts of chrysanthemum, and 3-5 parts of red dates. The plant rehabilitation drug belongs to the pure plant preparation of traditional Chinese medicine, and excludes substances which may cause addiction again; besides, the drug has good treatment effect to outward dispersion of deficient yang, damp heat and interior dampness, hear threatening pain, headache and deficiency syndrome of the lung, boring and sorrow, insufficient reorganization of nervous centralis and other symptoms caused by taking drugs; the withdrawal is fast and relapse rate is low.