The invention relates to a drillable well cementation ground anchor device which comprises a ground anchor sleeve. A center pipe is arranged in the ground anchor sleeve in a sliding mode, a throttling nozzle is installed at the lower end of the center pipe, six anchor claws are arranged on the wall of the ground anchor sleeve in the peripheral direction, and roots of all the anchor claws are connected with the wall of the ground anchor sleeve in a rotating mode. One end of a connecting rod is connected to the positions, close to the roots, of the inner sides of the anchor claws through a lower connecting pin, the other end of the connecting rod is connected with a pin base through an upper connecting pin, and the pin base is fixedly connected to the wall of the center pipe. A plurality of through grooves are formed in the outer cylinder wall, located below the anchor claws, of the ground anchor sleeve at intervals. A guide rod arranged in the length direction of the ground anchor sleeve is arranged in each through groove. One sliding block is connected to each guide rod in a sliding mode. All the sliding blocks are fixedly connected to the outer wall of the center pipe in the peripheral direction. Each guide rod is sleeved with a spring. The upper ends of the springs abut against the lower sides of the sliding blocks.