The invention discloses a drug composition with an effect of suppressing tumor, and discloses the process for preparing the drug composition and the purpose of the drug composition. The drug composition comprises three drugs such as galangal rhizome, nutgrass flatsedge rhizome and ningpo yam rhizome, and the steps of steam distillation, filtration, desiccation and the like are adopted in the preparation process. The drug composition of the invention comprises an alpinia-cyperus pill tinged with flavor, which is mainly used to treat stomach cancer, esophageal cancer and bowel malignant tumor. Experimental study shows that the drug composition of the invention also has a prominent effect in suppressing other tumors.