The utility model discloses a diamond drill bit belongs to technical equipment fields such as oil and natural gas probing engineering, mine engineering, building foundation engineering construction, geological drilling, tunnel engineering, the hydrology and non - excavation, including the drill bit body to and extend a plurality of wing from the drill bit body, be provided with the cutting component on the wing, at least one annular blank tape around the drill bit center has on the drill bit, and the wing of annular blank tape position to the indent, form the recess that circumference has a perfect understanding. The utility model discloses can reduce the cutting energy consumption of drill bit, promote broken rock efficiency, can restrain drill bit transverse vibration simultaneously, the impact that effectively reduces the drill bit cutting teeth was become invalid, the anti drift ability of reinforcing drill bit in directional drilling to can produce the jumbo size detritus, improve the geological logging quality, improve under the real brill condition accuracy to stratum information analysis and judgement in the pit.