Cefoselis sulfate crystal and preparation method thereof

The invention relates to a cefoselis sulfate crystal and a preparation method thereof. The powder X-ray diffraction pattern of a cefoselis sulfate crystal sample of the invention has peaks at the parts where the reflecting angle 2theta is 18.898+/-0.2, 22.155+/-0.2, 24.683+/-0.2, 12.947+/-0.2 and 20.061+/-0.2, wherein the ratio of the intensity of the peaks where the 2theta is 18.898+/-0.2 is 100%, the ratio of the intensity of the peaks where the 2theta is 22.155+/-0.2 and 24.683+/-0.2 is not less than 90%, and the ratio of the intensity of the peaks where the 2theta is 12.947+/-0.2 and 20.061+/-0.2 is not less than 70%. The cefoselis sulfate crystal sample of the invention has stable properties and uniform quality and provides insurance for clinical application of cefoselis sulfate medicines.