Inositol nicotinate crystalline form a and preparation method therefor

Provided are an inositol nicotinate crystalline form A and a preparation method therefor. The X-ray powder diffraction analysis, obtained by using Cu-K α ray measurement, of the inositol nicotinate crystalline form A has obvious characteristic diffraction peaks at least at 2θ values, expressed in degrees, of 7.05°, 7.41°, 9.74°, 17.80°, 19.86°, 23.57°, 25.48° and 26.20° with an error range of +/-0.2°. The preparation method is one of or a mixed crystallization method of two or more of an evaporation crystallization method, a cooling crystallization method or an anti-solvent crystallization method. The process thereof is simple and easy to operate, and has more selectivity; the inositol nicotinate crystalline form A can be prepared by various methods, and the prepared product has a good crystallization degree and high chemical stability; and the inositol nicotinate crystalline form A prepared by the present method does not have the problem that a residual solvent is out-of-limit.