The invention discloses a belt-type series resistor welding positioning tool and a belt-type series resistor welding technology. According to the key points of the technical scheme, the belt-type series resistor welding positioning tool comprises an upper positioning block, a middle transverse positioning block and a lower positioning block; the upper positioning block and the lower positioning block are located on the upper portion and the lower portion of the middle transverse positioning block correspondingly, the upper positioning block and the lower positioning block are both obliquely arranged relative to the middle transverse positioning block, and the ends, close to the middle transverse positioning block, of the upper positioning block and the lower positioning block are located on the same side. The belt-type series resistor welding technology comprises the step B that one resistor belt of one of groups is positioned on the lower end face of the lower positioning block, the other resistor belt is positioned on the upper end face of the middle transverse positioning block, one resistor belt of the other group is positioned on the upper end face of the upper positioning block, the unwelded end of the other resistor belt makes contact with the unwelded end of the resistor belt positioned on the middle transverse positioning block, and the unwelded ends of the two resistor belts on the middle transverse positioning block are welded together through a vertical spot welding machine.