The invention relates to a manufacturing method for connecting hollow prestressed square piles by using bolts. The manufacturing method is applied to the process of pile sinking, the second section pile and the first section pile need to be connected, and then pressure continues to be exerted downwards. According to the manufacturing method, the technology that a mechanical method is used for connecting the piles is directly adopted, and connecting flanges combined with the bolts only need to be adopted in pile heads needing to be connected. According to the problems existing in a traditional end plate welding method for the hollow prestressed concrete square piles and a pulp anchor method used in the pile connecting process, the mechanical bolt connecting technology can be applied to the hollow square pile connecting construction, and therefore the construction speed is increased and the manufacturing method can be popularized and applied in similar projects.