Circuit board welding system and circuit board positioning tool

The invention discloses a circuit board welding system and a circuit board positioning tool, and relates to the technical field of circuit board connectors. The circuit board welding system and the circuit board positioning tool comprise a base plate and a circuit board, the surface of the base plate is fixedly connected with a sliding rail, the surface of the base plate is fixedly connected with a T-shaped groove, the surface of the base plate is provided with a positioning rod, the side face of the circuit board is fixedly connected with a first element, the side face of the circuit board is fixedly connected with a second element, and the first element and the second element are fixedly connected with the circuit board. A T-shaped block is fixedly connected to the lower end of the first element, a sliding block is fixedly connected to the lower end of the second element, and a rotating shaft is rotationally connected into a T-shaped groove. A spring extrusion rod is extruded when a rotating rod rotates, wh