The invention discloses a hard coal anti-scouring pressure-relief boring construction method and equipment. A coal bed anti-scouring boring drilling technology integrating mechanical drilling and hydraulic jetting drilling is adopted. Firstly, high-pressure water is jetted to wash down coal mass, a drilling fracture surface is formed, then the coal mass washed down is crushed through a drill bit, and the high-pressure water flows back and carries out pulverized coal, so that the three-level boring drilling technology that rock is washed down hydraulically, crushed mechanically and carried out through backflow is achieved, and the effects of drilling, pore forming, dust settling, pulverized coal discharging and cooling are achieved. Through the crushing-after-washing drilling technology, the mechanical drilling mode is changed, characters of mechanical crushing are preserved, the boring drilling efficiency is improved, the hydraulic anti-scouring character is combined, and accordingly, the problems of low-efficiency drilling, getting stuck and stem loss, dust accumulation and the like of coal bed anti-scouring boring are effectively solved.