The invention provides a pharmaceutical composition containing
vildagliptin and
metformin. In the pharmaceutical composition,
vildagliptin is good in content uniformity, high in
dissolution rate and stable in product. A preparation method of the pharmaceutical composition comprises the steps that
metformin hydrochloride and an
adhesive are prepared into granules through a
fluidized bed granulation technology; the granules,
vildagliptin and a filler are mixed to be uniform, and then dry
granulation is conducted; the mixture is mixed with a
lubricant, and tablets are prepared. By means of the
fluidized bed granulation technology, the fluidity and
compressibility of
metformin hydrochloride are greatly improved, the
granularity of vildagliptin is controlled to be within a certain range, direction contact of
metformin hydrochloride and vildagliptin is reduced, and degradation of vildagliptin is reduced; by means of dry granulation, the content uniformity, a tablet
weight difference and the like of the granules all meet the requirements. By means of the preparation process, compound preparations with small differences between batches can be obtained, the
friability, content uniformity and stability of the tablets all meet the requirements, and the pharmaceutical composition can be subjected to scale-up production in a workshop.