Connecting joint for post-grouting of cast-in-place pile

The utility model discloses a connecting joint for post-grouting of a cast-in-place pile, which belongs to the technical field of conveying joints and comprises a joint shell, the joint shell comprises a first shell and a second shell which are oppositely arranged, and a pressurizing conveying assembly is arranged in the joint shell. The pressurizing conveying assembly comprises a supporting shaft arranged in the middle of the first shell and the middle of the second shell, and a rotating disc is arranged on the supporting shaft and located between the first shell and the second shell. The pressurizing conveying assembly is arranged, the overall design is simple, the structure is reasonable, the rotating disc, the flow guide pieces and the spiral blades are driven by torsion generated when the supporting shaft rotates to rotate at a high speed, and cement paste conveying pressure is improved through the spiral blades and arc-shaped sections of the flow guide pieces and the flow guide holes; and therefore, the