Lercanidipine hydrochloride crystal and preparation method thereof

Lercanidipine hydrochloride crystals (form (HX) Form) and its preparation method. The crystals free of water of crystallization and / or crystallization solvent, as a new stable crystalline form of high purity, suitable for industrial mass production, has the characteristics of easy operation, it is beneficial to provide a pharmaceutical composition for clinical use, and . The crystal using Cu-Kα radiation, X-ray powder diffraction spectrum of surgery at an angle 2θ represents a display has the following characteristics (see above formula).