The DTH drilling tools produced by Liteao include two series of high wind pressure and low wind pressure. The shape of crown is mainly two-airfoil or multi-airfoil, and the end surface design mainly includes planar and concave-convex surfaces. Among them, the planar structure can make maximum use of the cutting surface; the convex face is self-repairing and stable, and has greater impact on the formation, which is suitable for hard rock; the concave side has a good anti-skew effect.