Arc extinguish chamber of breaker

The utility model provides an arc extinguish chamber of a breaker. The arc extinguish chamber comprises a first shell body, a second shell body, and an insulation cover for insertion of the first shell body and the second shell body. The first shell body and the second shell body are spliced together through a splicing structure. The first shell body and the second shell body spliced together are inserted into the insertion slot of the insulation cover through an insertion end, and thus the insulation cover surrounds the first shell body and the second shell body spliced together. The arc extinguish chamber employs the splicing assembly mode, the assembly efficiency of the arc extinguish chamber is raised, the working procedures are simplified, the production cost is lowered, and the mechanical strength and the stability of the arc extinguish chamber are raised. An arc extinguishing grid sheet is installed between the first shell body and the second shell body. The insulation cover surrounds the first shell b