A Semen Cassiae soft capsule for lowering blood lipids and losing weight and the preparation method thereof. The content of the soft capsule consist of the following components by weight part: 10-60 parts of ethanol soluble extract powder of Semen Cassiae, 2-10 parts of aqueous soluble extract powder of Radix Glycyrrhizae, 10-30 parts of evening primrose oil, 5-20 parts of sea buckthorn seed oil and 2-10 parts of beeswax. The preparation method includes the following steps: preparing all the components respectively dissolving the ethanol soluble extract powder of Semen Cassiae in ethanol, adding 50% of the total weight of beeswax, heating in a water bath at 75 degrees Celsius to obtain a liquid mixture of Semen Cassiae and beeswax heating the remainder beeswax with evening primrose oil, adding the liquid mixture of Semen Cassiae and beeswax while continuously stirring, adding aqueous soluble extract powder of Radix Glycyrrhizae, cooling the mixture by circulation water, adding sea buckthorn seed oil and continuously stirring to obtain the content for soft capsules, encapsulating soft capsules by conventional method to obtain the Semen Cassiae soft capsule.
