Glue overflowing and wall breaking type building anchor bolt

The invention discloses a glue overflowing and wall breaking type building anchor bolt, and belongs to the technical field of building anchor bolts. A plurality of glue overflowing bags pre-fill the bottom end wall of an outer screw rod, in the spiral sinking process of an inner screw rod, a plurality of self-heating pieces move downwards along inner closed cavities by virtue of the magnetic attraction effect of a magnetic ring on the self-heating pieces, and the self-heating pieces enable the glue overflowing bags to be jacked, expanded and broken, so that anchoring glue in the glue overflowing bags overflows and is distributed inside and outside the outer screw rod, the outer screw rod and the concrete hole wall are connected in a gluing mode, and extrusion resistance caused by the fact that the anchoring glue is placed in advance does not need to be borne; and meanwhile after self-heating filler in the self-heating pieces automatically generates heat, on one hand, the hot melting effect on the glue overflo