Siwutang is recognized as a "blood tonic" in TCM, but it is said that "the core function of Siwutang is to promote blood circulation", and the conclusions are different. However, the author thinks that Siwu decoction is a representative prescription for enriching blood since ancient times. From its composition to clinical application, this prescription mainly focuses on enriching blood, which is a common prescription for enriching blood and a basic prescription for regulating menstruation. It was first seen in the Secret Recipe of Shangshen Dipsacus written by Lin Daoren in the late Tang Dynasty, which was used for traumatic blood stasis and pain. Later, it was published in the first national pharmacopoeia in China-Taiping Huimin and Hejiju Prescription in Song Dynasty (this book recorded the application of Siwutang in gynecological diseases for the first time). Later, it was recorded and commented in such medical books as Preparation of Obstetrics for Postpartum Prescription of Healthy Jiabao, Prescription of Regulating Experience in Ming Dynasty, and Outline of Regulating Menstruation in Yin Ji in Early Qing Dynasty. Siwutang was called "the first prescription of gynecology", "legislation of blood syndrome" and "regulating various blood syndromes as its specialty" by later physicians. This prescription has been used in Chinese medicine for thousands of years, and women are blood-oriented, so it is also called "female sacred medicine". Sun Wen thought that "Siwutang is a medicine for treating blood stasis in traumatology" in "Secret Recipe for Healing Wounds and Dipsacus in Traumatology", but it became an important prescription for enriching blood in gynecology in "Heji Fang Ju". Because of Fang Ju's great influence, later doctors often use Siwu Decoction as a prescription for enriching blood, which continues to this day. ". In fact, although the "Secret Recipe for Treating Wounds and Removing Dipsacus" says: "Anyone who has blood stasis in the intestines with severe injuries should use this medicine. Radix Paeoniae Alba, Radix Angelicae Sinensis, Radix Rehmanniae Preparata and Rhizoma Chuanxiong should be divided equally. Every time you take San Qian, you should fry it in a cup and a half of water until it is seven minutes cooked, and take it in a hollow hot way. " However, in the Qing Dynasty, Zhang said, "This prescription actually comes from the focus of Synopsis of the Golden Chamber, that is, the original prescription used Ejiao, Folium Artemisiae Argyi and Glycyrrhizae" (Shen Shi Gynecology Note, Volume II). Zhongjing Jiaoai Decoction was originally used to treat various bleeding syndromes caused by women's lack of chong and Ren, and yin and blood could not be hidden in it. Lin subtracted Colla Corii Asini, Folium Artemisiae Argyi and Glycyrrhrizae Radix, and identified Radix Rehmanniae Preparata and Radix Paeoniae Alba as Paeonia lactiflora, while retaining the original prescriptions of Radix Angelicae Sinensis and Rhizoma Chuanxiong, and named it "Siwu Decoction", thus making the prescriptions for nourishing blood, stopping bleeding, regulating menstruation and preventing miscarriage become the drugs for treating blood deficiency and blood stasis syndrome in traumatology. The secret recipe of dipsacus asperata is actually said to be "used by those with blood stasis in the intestine" on the premise of "serious injury". Naturally, there are serious qi and blood injuries, blood deficiency and poor blood circulation. Of course, Siwu decoction can be used as an "energy mixture", which does not mean that the core of this prescription is promoting blood circulation, but only that the core of this prescription is enriching blood and promoting blood circulation. To understand the problem, we should grasp the essence and not generalize. At present, many old Chinese doctors make good use of this prescription, especially some gynecologists of Chinese medicine make good use of this prescription to replenish blood and regulate menstruation, so they are called "doctors of Siwutang", and even some doctors are said to use this prescription all their lives, which shows the great clinical value of this prescription. Sun Wen thinks that communication is complementary, and explains that Siwutang is the essence of promoting blood circulation with the theory that women know that Danshen is used with Siwutang blindly, which is actually inferred from the indications of the Secret Recipe of Dipsacus. If you want to see whether it is promoting blood circulation or enriching blood, you can also see it at a glance from its pharmaceutical ingredients. In the prescription, Danggui nourishing blood, regulating menstruation and removing blood stasis are the monarch, Rehmannia glutinosa nourishing yin is the minister, Paeonia lactiflora nourishing blood and astringing yin is the assistant, and Chuanxiong regulating blood is the assistant. The four flavors are combined, enriching blood without stagnation, promoting blood circulation without breaking blood, and playing the role of enriching blood and regulating menstruation. Addition and subtraction with syndrome can treat all kinds of blood diseases. As can be seen from the textbooks of traditional Chinese medicine, Angelica sinensis, Radix Rehmanniae Preparata and Radix Paeoniae Alba are all listed as blood-nourishing drugs, and only Ligusticum chuanxiong is a blood-activating and blood-stasis-removing drug, and the dosage of this prescription is not large, so its blood-activating effect is far less than that of blood-nourishing. We know that Siwutang is adapted from Jiao 'ai Decoction in Synopsis of the Golden Chamber, which is a common prescription for enriching blood and a basic prescription for regulating menstruation. Diseases such as blood deficiency syndrome, irregular menstruation and puerperal diseases can be treated with this recipe. When using, the key points of syndrome differentiation are dull lips and claws, sallow complexion, pale tongue and thready pulse. If the fetal movement is uneasy during pregnancy and the bleeding is not stopped, Artemisia argyi and Colla Corii Asini are added; Dysmenorrhea due to blood deficiency and blood stasis is characterized by pale menstruation, irregular menstruation and less abdominal pain. Incense and Rhizoma Corydalis are added to relieve depression, regulate menstruation and relieve pain. If qi deficiency occurs at the same time, Radix Codonopsis and Radix Astragali can be added to replenish qi (Yu Sheng Decoction); For patients with blood stasis, peach kernel and safflower can be added to promote blood circulation and remove blood stasis (Taohong Siwu decoction); If you have a cold due to blood deficiency, add cinnamon and ginger to warm the middle and tonify yang; If blood deficiency is accompanied by fever, Cortex Moutan and Scutellariae Radix are added to clear heat and cool blood; If there is too much bleeding and the breath drops, we should reuse the qi-invigorating drugs in accordance with the spirit of "removing blood and invigorating qi" to replenish qi and generate blood. This prescription and Sijunzi decoction, a representative prescription for invigorating qi, are added with ginger and jujube to make Bazhen decoction for treating deficiency of both qi and blood, and added with cinnamon and astragalus to make Shiquan Dabu decoction, which is mainly used for treating physical weakness, asthma, nocturnal emission, blood loss, metrorrhagia and irregular menstruation. In Taohong Siwu Decoction, a medicine for promoting blood circulation and removing blood stasis, Paeonia lactiflora is easy to be Paeonia lactiflora and Huang Yi is dry. Its derivative prescriptions, such as Xuefu Zhuyu Decoction, Tongqiao Huoxue Decoction, Gexia Zhuyu Decoction, Shaofu Zhuyu Decoction and Shentong Zhuyu Decoction, are all medicines for promoting blood circulation and removing blood stasis. Zhang Taiyan's "Convenient Reading" said: "The wife relies on blood and ears, and the reason why doctors make up for disadvantages is only blood and ears. Therefore, the prescriptions for invigorating qi are all transformed from the four kings; All prescriptions for enriching blood should be transformed from four things. Those who invigorate qi seek spleen and lung; Those who enrich blood should seek liver and kidney. Rehmannia glutinosa enters the kidney, strengthens water and nourishes yin, and Paeonia lactiflora enters the liver, astringing yin and benefiting blood, which is the right medicine for enriching blood. However, due to blood deficiency and stagnation, the meridians can not be unblocked, and they are afraid of earthiness and pure yin, so they have no chance to warm up. Therefore, it is necessary to add angelica, Chuanxiong and spicy incense, which can nourish blood and promote qi in blood. " Of course, Siwu decoction, as a tonic, is warm and dry. Therefore, for some people with hot constitution or internal heat, taking Siwu decoction is easy to get angry, so the original prescription should be adjusted accordingly. In a word, Siwutang, as a famous prescription for enriching blood in past dynasties, its core function is to enrich blood and blood, not to "promote blood circulation". From the analysis of its pharmaceutical composition to its wide application in clinic, it is all for enriching blood. When we inherit and carry forward Chinese medicine, we can doubt the experience of the ancients, but we can't deny it at will.