The invention discloses a captopril zinc complexe and its preparation method and preparation. The captopril zinc complexe is prepared by combining captopril and zinc ions in a molar ratio of 1:1, the captopril zinc complexe is small in blood concentration fluctuation and easy to prepare. The preparation method related in the invention has the advantages of simple operation, mild reaction condition and easy control, and elemental analysis and XRPD (X-ray powder diffraction) analysis results show that the prepared captopril zinc complexe is high in purity and low in content of impurities.