Pebble collecting drill bit for pile foundation construction

The utility model relates to a pebble collecting drill bit for pile foundation construction, which resolves the problem that a drill bit of a common drill is slow in drilling into a pebble bed and low in pore-forming efficiency. The pebble collecting drill bit for pile foundation construction comprises a cylindrical drill hopper, an axial end of the drill hopper is equipped with a standard drill pipe connector, the inner wall of the other end opening of the drill hopper is equipped with steel wire rope braid rods which are radially uniformly arranged, the steel wire rope braid rods which are radially uniformly arranged are net-shaped on the end opening of the drill hopper, and alloy drill teeth are uniformly arranged on the circumference of the outer wall and the axial end portion of the other end opening. By utilizing a steel wire net and a special structure thereof at the front of the drill bit, the pebble collecting drill bit collects pebbles into the drill hopper thereof, small pebbles can be discharged out of holes through a drill sludge reverse-circulating system, and pebbles with relative large diameters can be taken out through a lifting drill. The drill hopper of the pebble collecting drill bit and the drill rod are equipped with general connectors, thereby facilitating matching between the drill bit and a drill rod of a common drill.