The invention relates to an alignment method and an alignment tool for the spatial position of a circuit breaker. The alignment tool comprises a first reference plate arranged on an arc extinguishingchamber and a second reference plate arranged on a lower wiring board, wherein the first reference plate is provided with a first reference direction; the second reference plate is provided with a second reference direction; the second reference plate is further provided with a positioning surface matched with a rectangular block for positioning a pin hole; the first reference plate is provided with a first compass; the second reference plate is provided with a second compass; a first preset included angle is formed between the first compass and the first reference direction; a second preset included angle is formed between the second compass and the second reference direction; a third preset included angle when assembling is completed is formed between the first reference direction and the second reference direction; the included angle between the first compass and the second compass is changed by rotating the arc extinguishing chamber so that the included angle between the first reference direction and the second reference direction is adjusted to the third preset included angle. The assembly efficiency of the vacuum circuit breaker can be guaranteed effectively, and the assemblyefficiency is improved obviously.