The present invention relates to a crystal form of 9-aminomethyl substituted tetracycline compounds and a preparation method therefor, and in particular, to a crystal form of the compound represented by formula (I), a preparation method for a crystal form of the compound represented by formula (I) and use of the crystal form in the preparation of drugs for treating and/or preventing infectious diseases caused by tetracycline sensitive bacteria and/or tetracycline resistant bacteria.
