Abstract: The present disclosure provides a pharmaceutical composition of fused tricyclic gamma-amino acid derivatives and the use thereof. The pharmaceutical composition includes: (i) a compound having a structure represented by formula (I) or a pharmaceutically acceptable salt thereof, as an active material, in an amount of 1% to 45% by weight; (ii) optionally one or more fillers in an amount of 50% to 95% by weight; (iii) optionally one or more lubricating agents in an amount of 0.1% to 5.5% by weight; and the sum of weight percentages of the all components is 100%, wherein the pharmaceutically acceptable salt of the compound of formula (I) has a structure as follows.