Stable solid medicinal composition and preparation method thereof

The invention discloses a stable solid medicinal composition. The stable solid medicinal composition contains a compound A and more than one pharmaceutically acceptable pharmaceutic adjuvant, wherein the weight percentage of the impurity E in the solid medicinal composition does not exceed 1.0%, and the total weight percentage of all the impurities does not exceed 1.3%. The solid medicinal composition provided by the invention is good in stability, so that the medication safety and effectiveness are effectively guaranteed, meanwhile, the generation of untoward effects during the use process of the medicinal composition is reduced, the quality of the product is effectively guaranteed, and a good guarantee is provided for the medication safety and effectiveness.