A switching device for a multi-split air conditioner, comprising: a housing, a gas-liquid separator, multiple first indoor unit interface pipes, at least one heat exchange component, and multiple second indoor unit interface pipes. The gas-liquid separator is provided with an inlet to an outdoor unit, a first outlet, and a second outlet. The multiple first indoor unit interface pipes and the multiple second indoor unit interface pipes are spaced from each other in a first direction. The first outlet is connected to multiple first interfaces by means of the multiple first indoor unit interface pipes, respectively. The first and second indoor unit interface pipes are spaced apart in a second direction. Some of the first and second indoor unit interface pipes are spaced apart from the rest of the first indoor unit interface pipes and the rest of the second indoor unit interface pipes in the second direction.