The invention belongs to the field of traditional Chinese medicines and discloses a traditional Chinese medicine composition for inhibiting tumor growth and a preparation method thereof. The traditional Chinese medicine composition disclosed by the invention is prepared from the raw materials including radix aconiti lateralis preparata, cassia twig, asarum, radix scrophulariae, oyster, thunberg fritillary bulb, raw pinellia, ginger, honey-fried licorice root, spreading hedyotis herb, sculellaria barbata, radix ginseng rubra, lucid ganoderma, platycodon grandiflorum, fructus aurantii, centipede, scorpio, pangolin, rhizoma dioscoreae, coix seed, polyporus umbellatus, poria, pseudo-ginseng, turtle shell, dioscorea bulbifera, momordica cochinchinensis, selfheal, edible tulip, radix sophorae subprostratae, celosia cristata, herba epimedii, fructus psoraleae, amber and red orpiment. The traditional Chinese medicine composition is capable of tonifying kidney and spleen, removing stasis, eliminating inflammation around tumors, removing tumor toxin and swelling lymph gland, better displaying the functions of various internal organs, improving immunity of the organism, self-inhibiting and eliminating tumor cells, making a local lump diminish or disappear and recovering the health status of a human body. The preparation method of the traditional Chinese medicine composition disclosed by the invention is simple to operate and suitable for industrial production.