Decoction of Chinese medicines is an operation method to decoct one or several kinds of Chinese medicines with water and remove the dregs to get the juice. In Chinese medicine clinics, when decocting Chinese medicines for tonifying qi and blood, the decoction time and dosage should be appropriate, when the decoction time is too long or the dosage is too much, it will cause excessive volatilization of the active ingredients of the medicines and affect the efficacy of the medicines. Clinically, the decoction time, the amount of water, the amount of juice is not the longer or the more the better, it should be decided by the physician according to the patient’s specific constitution and condition after identification, do not blindly choose a large dose of drugs to decoct on their own without any basis, in order to avoid adverse reactions. In addition, if patients experience nausea and vomiting, headache and dizziness, fatigue and other discomforts after taking Chinese medicine soup, it is recommended that they stop taking the medicine and consult a doctor promptly. Therefore, no matter which type of Chinese medicine is not decocted the more juice the better.