To explore the compatible mechanism and the clinical significance of Astragalus membranaceus

A. membranaceus matches with Codonopsis pilosula

Atractylodes macrocephala and Dioscorea oppositae to cure chronic diarrhea

with A. macrocephala

Stephania tetrandrd and Semen Coicis to cure edema;with Angelica sinensis

Paeonia veitchii and Ligusticum chuanxiong to cure the sequelae of paralytic stroke

with A. macrocephala

Peucedanum dielsianum and Concha ostreae to cure spontaneous perspiration.Then observe the clinical effect of A. membranaceus matched with different herbs of traditional Chinese Medicine. A. membranaceus can cure many diseases with different chinese herbs and then its effect and the mechanism of different compatibility in clinics are determined.A. membranaceus is of more importance in clinics for its different principles and functions of compatibility.