The invention discloses a traditional Chinese medicine composition and an external patch for resolving depression, calming the heart and soothing nerves and a preparation method of the external patch.The traditional Chinese medicine composition comprises the following raw materials in parts by weight: 45-60 parts of citrus aurantium, 12-15 parts of geranium, 5-6 parts of rhizoma acori graminei, 45-60 parts of rose, 6-9 parts of valerian and 6-9 parts of lavender. Volatile oil of the citrus aurantium, the geranium, the rhizoma acori graminei, the rose, the valerian and the lavender is extracted by adopting a steam distillation method, water decoctions are collected, and the water decoctions of the six medicines are concentrated to be equivalent to 1g x mL<-1> of raw medicinal materials; and the volatile oil is prepared into micro-emulsion from hydrogenated castor oil 0040-polyethylene glycol-40, Tween 80, glyceryl monocaprylate, absolute ethyl alcohol and double distilled water, and auxiliary materials are added to obtain the patch for resolving depression, calming the heart and soothing nerves. Natural medicinal materials are adopted, are easy to obtain, and have small toxic and side effects.