Corydalis tuber water soluble part medicament and its preparation method and application

The invention relates to a pharmaceutical prepared from corydalis tuber water-soluble parts and a preparation method thereof. The preparation method comprises pulverizing corydalis tuber material into coarse powder; extracting with 80% ethanol under heating and refluxing for three times and four hours each time; mixing the extraction solutions; recovering and concentrating until the relative density reaches 1.02-1.06 (50DEG C) to obtain corydalis tuber extract; adsorbing with a macroporous resin column; eluting with water of 6-8 times the volume of the column; collecting the water eluant; recovering water; and drying. The invention also relates to the application of the pharmaceutical on treating cardiovascular diseases, particularly preparing pharmaceuticals for treating coronary heart disease, angina pectoris and acute myocardial infarction.