Circuit breaker, static arc contact and preparation method thereof

The invention relates to the technical field of arc contacts for circuit breakers, in particular to a circuit breaker, a static arc contact and a preparation method of the static arc contact. The preparation method of the static arc contact comprises the following steps: performing interference insertion at the connection position of the contact part and the tail base body, and then welding and fixing at the butt joint surface of the contact part and the tail base body in the insertion direction. The contact part and the tail base body can be tightly and reliably connected in the circumferential direction by performing interference insertion at the connection position of the contact part and the tail base body, and then the butt joint surfaces of the contact part and the tail base body in the insertion direction are welded and fixed, so that reliable connection of the butt joint surfaces of the contact part and the tail base body can be realized. The static arc contact is prepared through the preparation meth