The invention discloses an oral solid preparation containing any one, or a mixture of two or more of crystalline form I, II, III, and IV of the compound represented by formula (A). The oral solid preparation of the present invention disintegrates rapidly, increasing dissolution rate thereof, thereby improving bioavailability. In particular, it is possible to solve the problem that an active material (active ingredient), which is high hygroscopic and becomes sticky after moisture absorption, can not be effectively disintegrated by conventional disintegrants. The present invention further relates to a use of the oral solid preparation in preparing an angiotensin II receptor antagonist or a use thereof in preparing medicine for preventing and/or treating hypertension, chronic heart failure and diabetic nephropathy.
