Net column Cango monohydrate and polymorphs, their preparation and use

The present invention relates to a net Cango column hydrates and polymorphs, as compared with the prior art, the net column Cango monohydrate and high polymorphic stability in water or in an aqueous system, more suitable wet or made into suspension granulation process, and good storage stability. The present invention further relates to the net Cango column monohydrate crystalline form its preparation, to pharmaceutical compositions thereof for the preparation of a medicament for treating diabetes, diabetic complications, obesity and other diseases.