The invention relates to dendrobe aqueous extract and application thereof, and belongs to the technical field of pharmacy. The dendrobe aqueous extract disclosed by the invention is obtained by the following method: a, cutting dendrobe into pieces by scissors and adding the dendrobe pieces to water in the proportion W/V of 1:(10-20) for boiling; continuously keeping the boiling state for 2 hours to 4 hours after the drendrobe is boiled in the water; removing the residues by filtering through gauze and collecting the water extract; b, repeating the step a for twice to four times, combining the extracting solution every time; and freezing and drying the extracting solutions to obtain powder dendrobe water extract. The dendrobe is wild or artificially-cultivated fresh dendrobe or dried dendrobe. The invention further relates to the application of the dendrobe aqueous extract in preparing hemostatics. According to the dendrobe aqueous extract and the application thereof disclosed by the invention, the dendrobe aqueous extract provided by the invention has strong pharmacological action, the bleeding time is remarkably shortened and the medical prospect of the dendrobe aqueous extract in developing and preparing hemostatics are disclosed; and secondly, a novel application field of the dendrobe is developed.