A golf bag able to be disassembled and assembled freely comprises a head frame, a bag body portion, a supporting stick and a bottom frame, or a folding wall arranged on the bottom frame, a plurality of buckles are attached to the head frame and the bottom frame; when the golf bag is disassembled, just press a hook of an outer wall of the bottom frame, snap a buckle pin, take out a supporting stick, press a hook of an upper end and lower end of the bag body portion, and separate the head frame, the bag body portion and the bottom frame, such that the disassembly of the whole golf bag is completed.