Aim To explore the effect of the main active components combination of Astragalus promoting hematopoiesis on mouse model of bone marrow hematopoietic suppression. Methods The contents of five main active components such as ferulic acid, astragalo-side IV, formononetin, calycosin and calycosin glycoside were determined after the extract of Astragalus combined with Angelica at 1 : 1 ratio was prepared by water extraction, thus ascertaining the combination dosage. Mice were randomly divided into blank control, model, active component alone, five a...