Node pouring formwork system and method capable of conducting steel bar positioning

The node pouring formwork system comprises a formwork assembly, the formwork assembly is detachably connected with a positioning mechanism stretching into a pouring area, the positioning mechanism comprises a shell, a lead screw is arranged in the shell, sliding ways parallel to the lead screw are arranged on the two sides of the lead screw, the sliding ways are connected with sliding parts, and the sliding parts are connected with the formwork assembly. A locking mechanism is arranged between the slide way piece and the slide way, the sliding piece is provided with a guide hole, a semi-circular-ring component penetrates through the guide hole in a sliding mode, and the side face of the semi-circular-ring component is provided with driving teeth meshed with the lead screw. The shell is provided with a sliding groove so that the two semi-circular ring components can stretch out of the shell to form a circular ring structure for positioning the reinforcing steel bars or retract into the shell under the action o