Drilling tool bit for blind hole drilling

The utility model discloses a drilling tool drill bit for blind hole drilling, which comprises a drill bit main body, the end part of the drill bit main body is fixedly connected with a drilling plate, the side wall of the drill bit main body is provided with a positioning insertion hole, the side wall of the drilling plate is provided with a water outlet hole penetrating through the drilling plate, and the side wall, close to the drill bit main body, of the drilling plate is fixedly provided with a sediment blocking mechanism. When the drilling position needs to be adjusted and the supply of the cooling lubricating liquid of the drill rod needs to be suspended, a spherical blocking block of the sediment blocking mechanism shields and seals the water inlet hole, so that a large amount of sediment cannot enter the drill bit main body, and only a small amount of sediment enters a fixing frame of the sediment blocking mechanism; due to the rotation of the drill bit main body, the pressure of the cooling lubricat