The invention relates to a gas-insulated metal-enclosed switchgear. The gas-insulated metal-enclosed switchgear comprises three GIS phases; the main bus-bar of each GIS phase comprises a first main bus-bar and a second main bus-bar which extend in a left-right direction; the first main bus-bar is electrically connected with a first branch bus-bar; the second main bus-bar is electrically connectedwith a second branch bus-bar; the first branch bus-bar and the second branch bus-bar are respectively provided with a first wire outgoing end and a second wire outgoing end; a first circuit breaker isarranged between the first main bus-bar and the first wire outgoing end; a second circuit breaker is arranged between the second main bus-bar and the second wire outgoing end; the first circuit breakers of the GIS phases are linearly arranged in parallel in a left-right direction; the first circuit breakers of the GIS phases are located on the front sides or rear sides of the main bus-bars; and the second circuit breakers of the GIS phases are linearly arranged in parallel in a left-right direction and are positioned on the front sides or the rear sides of the main bus-bars of the GIS phases.With the gas-insulated metal-enclosed switchgear of the invention adopted, the problem of the large overall width of a GIS in the prior art caused by a condition that corresponding circuit breakers in three phases are distributed along main bus-bars can be solved.