The invention discloses a soft capsule for treating chronic adnexities and a preparation method thereof, the soft capsule comprises the effective components in parts by weight: 10-30 parts of leonurus, 5-20 parts of bupleurum, 3-18 parts of peach kernel, 5-15 parts of mustard seed, 10-20 parts of bending corydalis, 5-15 parts of astragali, 3-20 parts of Bulbophyllum, 2-18 parts of trifoliate akebia, 5-15 parts of dried rehmannia, 4-16 parts of selinum japenious seed, 2-20 parts of lindera, 5-15 parts of frankincense, 10-30 parts of shiny bramble, 10-30 parts of ginseng, 2-20 parts of tangerine pip, 2-20 parts of ovateleaf holly bark, 4-16 parts of curcuma, 5-25 parts of coix, 5-15 parts of placenta, 4-20 parts of Chinese clinopodium herb and 5-20 parts of hawthorn fruit; the soft capsule is obtained by extracting, decocting, super micro-grinding, spray-drying and suppressing. The raw materials of the soft capsule disclosed by the invention are traditional Chinese medicine materials, have no side effects, conform to traditional Chinese medicine and pharmacology and modern medicine and pharmacology theory, complementary with each other on effects, can effectively play the roles of antibiotics and anti-inflammation, relieving swelling and pain, moving qi and dissipating binds, promoting blood circulation and removing dampness. The soft capsule for treating chronic adnexitis is remarkable in efficacy, short in treatment course, no recrudescence after being cured, safe and reliable, free from toxicity and side effects.