The present invention belongs to the technical field of medicines, and relates to a crystal form of a compound used as a mineralocorticoid receptor antagonist and a preparation method therefor, and in particular, to a method for preparing a compound 2-chloro-4-[(3S,3a R)-3-cyclopentyl-7-(4-hydroxypiperidine-1-carbonyl)-3,3a,4,5-tetrahydro-2H-pyrazole[3,4-f]quinoline-2-yl]benzonitrile of formula (I), a crystal form thereof, a preparation method for the crystal form, and the use of the crystal form in the preparation of drugs for the treatment and/or prevention of renal injury or cardiovascular diseases.
