The invention provides homoisoflavonoid compounds, which are prepared by the following steps: grinding dwarf lilyturf tuber, adding extraction solvent into the ground dwarf lilyturf tuber according to a weight / volume ratio of the medicinal material to the solvent of 1:(6-10), performing normal-temperature extraction or reflux extraction, mixing extract solution, concentrating under reduced pressure, dissolving the extract in water, extracting in an organic solvent, recovering solvent to obtain coarse total homoisoflavonoid, loading onto a macroporous resin for eluting to obtain total homoisoflavonoid active part extract, and obtaining the homoisoflavonoid compounds by separation by normal silica gel, reversed silica gel and aluminum oxide column chromatography. A cell level H9C2 cardiac muscle cell line oxygen-glucose deprivation pharmacological model proves that the homoisoflavonoid compounds have anti-myocardial ischemia activity and can be used for preparing medicines for treating cardiovascular diseases such as ischemic heart diseases, coronary diseases, myocardial ischemia, myocardial infarction, stenocardia, arrhythmia and cardiac insufficiency. The general structural formula of the compound is shown below.