Hydraulic chuck capable of adjusting high pressure and low pressure and adjusting method thereof

The invention discloses a hydraulic chuck capable of adjusting high pressure and low pressure and an adjusting method thereof, and belongs to the technical field of hydraulic chucks. The invention relates to a hydraulic chuck capable of adjusting high pressure and low pressure and an adjusting method of the hydraulic chuck. The hydraulic chuck comprises a device base, and four clamping blocks are annularly and evenly distributed on one side of the outer portion of the device base; a transmission column is arranged on one side of the outer portion of the transmission block, the transmission column is rotationally connected with one end of the transmission block through a second rotating connecting shaft, and the other end of the transmission block is rotationally connected with the transmission frame through a first rotating connecting shaft. According to the drill rod hydraulic chuck, the problem that the internal pressure of an existing drill rod hydraulic chuck cannot be adjusted in time according to the si