Silkworm sand belongs to the expectorant of wind-dampness medicine, China is the main output of silkworm sand, its taste sweet, pungent, warm, mainly into the liver, spleen, stomach meridian, with expectorant of wind-dampness, and stomach dampness, blood circulation, the efficacy of the pain, clinically used in the treatment of: First, rheumatism and paralysis, limb paralysis, and so on. Abdominal pain, vomiting and diarrhea due to summer dampness obstruction. Third, eczema, rubella itching. Silkworm sand contains chlorophyll, phytol, β-sitosterol, carotene, vitamin B, vitamin C and other ingredients, modern pharmacological research shows that silkworm sand has anti-inflammatory effect; have the role of regulating blood glucose; have the role of improving and treating anemia; have the role of scavenging free radicals, antioxidant effect; have the effect of inhibiting the growth of tumor cells and so on. It should be noted that, silkworm sand into the medicine need to be decocted with a cloth bag.