Provided are a solid dispersion improving absorption performance and a method for preparing same. Specifically, a solid dispersion is provided, comprising (A): a compound of Formula A as an active ingredient or a derivant thereof, or a pharmaceutically acceptable salt, a hydrate or a solvate thereof; and (B): a hydrophilic high polymer carrier. A weight ratio of (A) to (B) ranges from 1:1 to 1:40. The solid dispersion according to the present invention can significantly improve a vitro dissolution of the active ingredient and remarkably improve absorption of a mammal for the active ingredient, thereby effectively reducing the dosage thereof in use.