The present invention relates to a use of haloid acid salt and sulfonate of a compound of formula I and a salt of the compound of formula I in preparation of medicament for preventing or treating diseases caused by thrombosis or embolism. The present invention provides acid addition salts, especially haloid acid and sulfonic acid addition salts of a compound of formula I having high inhibition effect on platelet aggregation, and preparation method of the same, a medicament comprising the same, and a use and/or method for preventing or treating diseases caused by thrombosis or embolism.