Precast pile connecting piece, precast pile connecting structure and precast pile

The utility model relates to a precast pile connecting piece, a precast pile connecting structure and a precast pile. The precast pile connecting piece is used for being arranged in the section pile, an opening is formed in the precast pile connecting piece, a conical cavity communicating with the opening is formed in the precast pile connecting piece, and the conical cavity expands in the direction away from the opening; at least two locking petals are arranged in the conical cavity in the circumferential direction of the inner wall of the conical cavity, and a connecting hole is defined by the locking petals; the locking petals can slide along the inner wall of the conical cavity; the balance gasket can be in contact with the inner wall of the conical cavity to limit the balance gasket to turn over in the conical cavity; the balance gasket is connected with a reset assembly, and the reset assembly enables the locking flap to have the trend of moving towards the opening. According to the precast pile connect