Provided are a crystal form of a salt of a fused tricyclic γ-amino acid derivative and the preparation and use thereof. As shown in formula (I), Y is selected from maleic acid, fumaric acid, haloid acid (preferably hydrobromic acid and hydrochloric acid), sulfuric acid, phosphoric acid, L-tartaric acid, citric acid, L-malic acid, hippuric acid, D-glucuronic acid, glycollic acid, mucic acid, succinic acid, lactic acid, orotic acid, pamoic acid, malonic acid, gentisic acid, oxalic acid, glutaric acid or saccharin.