The invention discloses an anchor bolt for building construction, comprising a nut, a tray, a hollow shank and a bit; the nut is arranged at the back of the tray, the tray is of circular disc structure and is uniform in thickness, the nut is provided with a hex groove, a ceramic conical post sleeve is fixedly connected in the hex groove, the upper end of the nut is also provided with a reinforcing nut, the surface of the hollow shank is provided with an external thread, the other end of the hollow shank is sleeved with the bit, two of four upper holes in a residue groove of the bit are modified into lower air inlets, low pressure is formed at entries of the upper water holes due to the decrease in cross-sectional area and increase in speed when water or air enters form a transition blind hole to the upper water holes, air in the lower air inlets is sucked in, the pressure for discharging the water or air from the upper water holes is increased, and a borehole can be cleared; construction efficiency is improved, product strength is enhanced, and the reliability of an anchor bolt supporting system is improved.