PHC pipe pile connecting device

The PHC pipe pile connecting device comprises a first connector and a second connector matched with the first connector, multiple sets of arc-shaped grooves are formed in the surface of the first connector, and clamping blocks matched with the arc-shaped grooves are arranged on the surface of the second connector; a blocking part capable of limiting the clamping block after the clamping block is inserted into the arc-shaped groove to rotate is arranged on the inner wall of the arc-shaped groove, a containing groove and a groove opening which communicate with each other are formed in the first connector, and a limiting assembly is arranged in the first connector; the limiting assembly comprises an arc-shaped stop block connected into the containing groove in a sliding mode, a spring arranged between the arc-shaped stop block and the inner wall of the containing groove and a pawl rotationally connected to the inner wall of the groove opening through a torsional spring shaft, and a plurality of sets of oblique t