Slurry adsorption equipment for pile hole excavation

The utility model relates to the field of pile hole excavation, and particularly discloses a mud adsorption device for pile hole excavation, which comprises a water mill drill bit, a mud receiving barrel sleeved outside the water mill drill bit, a negative pressure mud suction pipe connected to one side of the mud receiving barrel, a one-way valve pipe mounted outside the negative pressure mud suction pipe, and a mud barrel mounted at the lower end of the one-way valve pipe. A limiting sliding groove is formed in the side wall of the slurry barrel, a floating ball is installed in the limiting sliding groove through a sliding block, an ejector pin is installed on the upper surface of the floating ball, an alarm is installed on the upper surface of the slurry barrel, and a pressing type switch is installed at the position, corresponding to the ejector pin, below the alarm. The negative pressure slurry suction pump is used for controlling the negative pressure connecting pipe to enable the whole slurry barrel to