Sea reef static breaking device under limited space condition

A static sea reef breaking device under the limited space condition comprises a pneumatic drilling machine, the pneumatic drilling machine comprises a drill rod, a drill bit and an infusion pipe, the drill rod is cylindrical, a first through hole is formed in one end of the drill rod, a guide block is fixed to the inner wall of the other end of the drill rod, and the infusion pipe is located in the drill rod and arranged in the axial direction; a guide groove extending in the axial direction is formed in the outer wall of the filling pipe, the guide groove is matched with the guide block, a second through hole communicated with the first through hole is formed in the filling pipe, the filling pipe is further communicated with a hose, and the hose penetrates through the first through hole and the second through hole and then is communicated with supply equipment used for providing an expanding agent. In the actual construction process, it can be avoided that when a hose is directly used for filling an expandin