A pharmaceutical composition comprises an active component KX2-361 represented by formula 1 or a medicinal salt thereof and hydroxylpropoxyl-?cyclodextrin. An inclusion compound is formed by KX2-361 or the medicinal salt thereof and hydroxylpropoxyl-?cyclodextrin, and the solubility of the poorly-soluble drug KX2-361 is improved. The pharmaceutical composition can be prepared into an intravenous preparation and an oral preparation.