The invention relates to an automobile seat side airbag arrangement structure. A fixing supporting frame is arranged on the side of a seat frame, a seat flank surface cover is sleeved with the outsideof the side edge of the seat frame, a seat side airbag is arranged on a side airbag fixing supporting frame, flank airbag cloth is arranged between the seat flank surface cover and the seat side airbag, and the flank airbag cloth and the seat flank surface cover are stitched through airbag tear sutures to form a seat side airbag ejection outlet; the surface cover and a foam structure are optimized and improved to effectively prevent or reduce foam tear and control splashing objects to fly out, simultaneously the seat side airbag surface cover is protected to the utmost extent, and the airbagis deployed in an arranged deployment direction and angle; the situations that airbag deployment delays, the airbag is cut, the airbag does not deploy in the arranged direction and angle and the likeare prevented, and a final purpose and function of protecting the safety of passengers are achieved.