The invention discloses a steel chisel for a hydraulic rock drill. The steel chisel comprises a prismatic chisel rod; two ends of the chisel rod form a steel chisel head respectively; three vertical grooves are formed in the side wall of the chisel rod; the groove annularly distributed on the chisel rod in an even way; a vertical guide bar is fixedly inserted into each groove; each guide bar forms a vertical groove path; the groove path and the bottom surface of the groove are enclosed to form a dust collection channel; the length of the guide bar is smaller than the length of the groove and forms gaps with two ends of the groove; the chisel rod on one end of the groove is fixedly covered with a shaft sleeve; an air inlet groove port communicated with the groove is formed in the inner wall of the shaft sleeve; an annular groove communicated with the air inlet groove port is formed in the shaft sleeve; and an air pipe connector communicated with the annular groove is fixed on the outer wall of the shaft sleeve. With the dust collection channel on the steel chisel, dust produced during steel chisel work can be absorbed by an external dust collector, so damage of dust to construction workers can be reduced and body health can be guaranteed.